Method of calibrating roadway middle waist line through smart phone photography
A technology of smartphones and midlines, which is applied in the direction of reference lines/planes/sectors, measuring devices, instruments, etc., and can solve problems that affect the quality of roadway engineering, low construction efficiency, and heavy instruments
Inactive Publication Date: 2019-07-16
BEIJING FORESTRY UNIVERSITY
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Problems solved by technology
Among them, in the underground measurement of coal mines, the measurement and calibration of the middle line will directly affect the quality of the roadway engineering. The traditional middle line calibration is often used to work with theodolite. Due to the heavy equipment, the construction efficiency is not high. At present, the middle line of the coal mine roadway The calibration project not only ensures the construction accuracy, but also improves the construction efficiency, which is imperative
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[0018] A method for calibrating the median line of a roadway by smartphone photography, which is characterized in that:
[0019] (1) Use a smart phone with a laser to calibrate the cutting point of the roadway, use a vertical rope to hang a cross to calibrate the middle waistline point, and hit the center of the cross with the laser beam to ensure that the calibrated point is on a straight line;
[0020] (2) The mobile phone app is used to determine the inclination angle; the inclination angle of the known roadway is δ, the azimuth angle is A, and after adding the correction value of the magnetic declination angle, it is ΔA;
[0021] (3) The coordinates of the known fixed point are (Xs, Ys, Zs), the focal length of the calibrated smartphone lens is f, the center line of the lens and the laser line of the laser are parallel to each other, and the height is h, where f and h are equal to It is known that the image plane coordinates of the image point are ui, vi, and the object sp...
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The invention discloses a method of calibrating a roadway middle waist line through smart phone photography. A smart phone is used in cooperation with a laser device to perform calibration work of roadway open-cutting points, a vertical rope hanging cross is utilized to calibrate middle waist line points, and a laser beam hits the center of the cross to guarantee that the calibrated points are located on the same straight line; a phone app is utilized to determine a dip angle; the known roadway dip angle is delta, the azimuth is A, and the azimuth with an added correction value of declinationis delta(A); the coordinates of a known fixed point is (Xs,Ys,Zs), the focal length of a checked smart phone lens is f, the center line of the lens and the laser line of the laser device are in mutualparallel, height is h, and f and h are both known; image plane coordinates of an image point are (ui,vi), and object space coordinates of a corresponding object point are (Xi,Yi,Zi); photogrammetry knowledge is utilized to obtain object space coordinates (X,Y,Z) of the center point of the cross; and then parallel lines of the middle waist line are calibrated.
Description
[0001] 1. Technical field [0002] The invention belongs to a method for marking the midline of a mine roadway. [0003] 2. Technical background [0004] Coal mine is a reasonable space excavated by human beings when excavating geological layers rich in coal, usually including roadways, shafts and mining faces, etc. In my country, coal resources are relatively abundant and it is a very important solid fuel, so coal mines mining is very common. Among them, in the underground measurement of coal mines, the measurement and calibration of the middle line will directly affect the quality of the roadway engineering. The traditional middle line calibration is often used to work with theodolite. Due to the heavy equipment, the construction efficiency is not high. At present, the middle line of the coal mine roadway Calibration engineering not only ensures the construction accuracy, but also improves the construction efficiency, which is imperative. [0005] 3. Contents of the inventio...
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IPC IPC(8): G01C15/00
CPCG01C15/004
Inventor 冯仲科练一宁
Owner BEIJING FORESTRY UNIVERSITY