Optical tip timing method based on tip surface microstructure

• Main Authors: CHAI QUAN, ZHANG JIANZHONG, ZHANG HONGYING, QU RUIXUAN, TAN TAO, TIAN YE, CHE NANA, LUO YANG, MU BOXIN
• Format: Patent
• Language: Chinese; English
• Published: 08.01.2019
• Subjects: MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC ORINFRASONIC WAVES; MEASURING; PHYSICS; TESTING; TESTING STATIC OR DYNAMIC BALANCE OF MACHINES ORSTRUCTURES; TESTING STRUCTURES OR APPARATUS NOT OTHERWISE PROVIDED FOR

The invention relates to the field of optical tip timing methods, and specifically relates to an optical tip timing method based on a tip surface microstructure. A mechanical processing means is usedto enable the tip surface to form a micro-surface with a characteristic structure along a vertical direction of the movement direction of a tip, and the scattered light intensity of the surface of themicrostructure is used to carry out time discrimination. The method comprises the following steps: step (1), constructing a tip surface characteristic structure; step (2), performing tip surface parameter calibration; step (3), acquiring a tip microstructure scattered light signal; and step (4), enabling the tip to achieve time demodulation. The optical tip timing method based on the tip surfacemicrostructure provided by the invention has the following advantages: different from other optical tip timing methods that threshold trigger is performed by using a rising edge or a falling edge of asignal, the method of the i