Method for measuring distortion of tall chimney based on outline

• Main Authors: LU HAIQING, ZHENG SHUNYI, MA DIAN, HU HUALIANG
• Format: Patent
• Language: Chinese; English
• Published: 11.01.2012
• Subjects: MEASURING; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS; MEASURING LENGTH, THICKNESS OR SIMILAR LINEARDIMENSIONS; PHYSICS; TESTING

The invention discloses a method for measuring distortion of a tall chimney based on an outline, which comprises the following steps of: (A) capturing the outline of the chimney by using a total station with a digital camera, and ensuring overlapping of two adjacently captured photos for the same outline of the chimney in a vertical direction; (B) quickly extracting the chimney outline in an image; (C) calculating an initial value of a chimney center; (D) selecting the most appropriate photo projected by a space section circle of a given height according to the initial value of the chimney center and known station coordinates; and (E) acquiring the initial value of iterative computation and carrying out the iterative computation on coordinates of the center of a circle and a radius of the space section circle. By the method, horizontal displacement monitoring for the chimney can be quickly realized, the precision is high, and the condition whether the method satisfies requirements or not can be judged through