US 12,442,919 B2
Photoelectric detection and acquisition system and centroid detection method based on single-pixel detector
Yingjian Wang, Hefei (CN); Dongfeng Shi, Hefei (CN); Jian Huang, Hefei (CN); Ke'e Yuan, Hefei (CN); and Linbin Zha, Hefei (CN)
Assigned to HEFEI INSTITUTES OF PHYSICAL SCIENCE, CHINESE ACADEMY OF SCIENCES, Hefei (CN)
Appl. No. 17/628,631
Filed by HEFEI INSTITUTES OF PHYSICAL SCIENCE, CHINESE ACADEMY OF SCIENCES, Hefei (CN)
PCT Filed May 14, 2021, PCT No. PCT/CN2021/093879
§ 371(c)(1), (2) Date Jan. 20, 2022,
PCT Pub. No. WO2021/228235, PCT Pub. Date Nov. 18, 2021.
Claims priority of application No. 202010412816.0 (CN), filed on May 15, 2020.
Prior Publication US 2022/0365211 A1, Nov. 17, 2022
Int. Cl. G01S 17/06 (2006.01); G01S 7/481 (2006.01)
CPC G01S 17/06 (2013.01) [G01S 7/4816 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A centroid detection method based on a single-pixel detector, comprising the following steps:
S1: establishing a photoelectric detection and acquisition system, wherein the photoelectric detection and acquisition system comprises a light generation component, a digital micromirror device (DMD), a lens, a photodetector that are arranged along a light path and a data acquisition unit that is coupled to the photodetector, and the light generation component in the photoelectric detection and acquisition system generates three two-dimensional (2D) array matrices A, B and C;
S2: generating, by letting element value of each column in the matrix A be the corresponding serial number of the column, element value of each row in the matrix B be the corresponding serial number of the row, and element value of the matrix C be 1, 2D modulation information having distribution of the matrices A, B and C;
S3: modulating illumination light according to the mode of the 2D modulation information and projecting the illumination light to a target object or modulating, according to the mode of the 2D modulation information, an image formed by the target object; and
S4: acquiring intensity value of target reflected light with the data acquisition unit in the photoelectric detection and acquisition system, and substituting the intensity value into a centroid solving algorithm to obtain position parameter of the target centroid.