A method of foreign object debris discrimination includes illuminating a particle located within a sensing volume with a modulated electromagnetic radiation pulse emitted from a source; receiving one or more electromagnetic radiation return signals that have been scattered by the particle illuminated by the modulated electromagnetic radiation pulse at a detector; mixing, using a controller, the electromagnetic radiation return signal of amplitude IRS and frequency fRS with a reference signal of amplitude ILS and frequency fRS; analyzing, using the controller, an amplitude of the mixed signal √{square root over (ILSIRS)}, and frequency of the mixed signal, fRS−fLS; and classifying, using the controller, a particle position, a velocity, and electromagnetic characteristic of the particle based on the amplitude, √{square root over (ILSIRS)}, and frequency, fRS−fLS, of the mixed signal.
- 출원번호 : 18668764
- 출원인 : RTX Corporation
- 특허번호 :
- IPC : G01N-021/88(2006.01);G01N-015/10(2006.01);G02B-006/38(2006.01);