The application discloses a kind of self-adapting rectangular
LED array methods and systems for uniform illumination of sea-
weed detection, belong to the field of illumination technology. Including four tilted surface
light source units, each surface
light source unit is tilted towards the
target surface center, for providing dark field illumination to sea-
weed surface;Each surface
light source unit includes
LED array and is arranged in the light direction of
LED array Cylindrical lens group;Each row of
LED lamp beads at the same height is electrically connected to an independent
control unit respectively, and is provided with
driving current by independent programmable
power module respectively;Optimization control module establishes the
mathematical model of the illumination superposition of each row of
LED lamp beads on the
target surface, solves the optimal power by optimization objective function and nonlinear
constraint algorithm, and is converted into actual
driving current output.The application forms rectangular dark field illumination by symmetrical tilted surface light source, effectively solves the problem of uneven illumination distribution under large-area dark field illumination of high-reflective sea-
weed surface, and improves the defect detection precision and reliability.