Error correction method for solar facula mass center and solar output angle of solar facula mass center
A technology of error correction and output angle, which is applied in the field of optical sensors, can solve problems such as complex calculations and incomplete correction factors, and achieve the effects of saving computing resources, simplifying error correction theory, and reducing computational complexity
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specific Embodiment approach 1
[0027] Specific embodiment one: a kind of brand-new error correction method of solar spot centroid and its solar output angle of this embodiment is realized according to the following steps:
[0028] Step 1: Correct the translation error of the sun spot centroid;
[0029] Step 2: Correct the z-axis rotation error of the center of mass of the sun spot;
[0030] Step 3: Correct the x and y axis rotation errors of the center of mass of the sun spot and calculate the sun output angle.
[0031] figure 2 is a schematic diagram of the spot centroid of the sun sensor and the sun output angle, where h is the distance between the photosensitive surface and the mask, α, β are the output angles of the sun sensor, (X C , Y c ) is the barycenter coordinate of the sun spot;
[0032] image 3 It is a schematic diagram of the imaging of solar facula under ideal conditions. At this time, the arctangent method can be used to directly calculate the solar output angle:
[0033] ...
specific Embodiment approach 2
[0088] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is: in step 1, in correcting the translation error of the sun spot centroid, the z-axis translation error refers to the distance between the photosensitive surface of the sun sensor and the mask The translation error of H, the expression of the translation error correction model is:
[0089] X c 1 = X c 0 ± Δx Y c 1 = Y c 0 ± Δy ...
specific Embodiment approach 3
[0091] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the correction of the z-axis rotation error of the center of mass of the sun spot in step 2 is realized by using the method of phase rotation based on coordinates. According to the actual sun spot image, The expressions involved in the revised model are:
[0092] x c 2 i = | x c 1 i - S | y c 2 i = | ...
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