Method of measuring longitude deformation of blades by differential radiation between blades and casing

US11466979B2 · kind B2 · utility

Assignee

• University of Electronic Science and Technology of China · CN

Inventors

• Chao Wang · Tainan, TW
• Zezhan Zhang · Sichuan, CN
• Peifeng Yu · Sichuan, CN
• Yi Niu · Sichuan, CN
• Ying Duan · San Diego, US
• Xueke Gou · Sichuan, CN
• Yekui Zhong · Sichuan, CN
• Anmei Qiu · Sichuan, CN
• Pei Huang · Lo Wu, CN
• Yuehai Zhang · Sichuan, CN
• Shan Gao · Beijing, CN
• Jing Jiang · Beijing, CN

Key dates

• Filing date: Jan 19, 2021
• Grant date: Oct 11, 2022
• Expiry date: Jan 19, 2041

Classification

• Technology area (CPC G): Physics
• CPC primary: G01B7/003
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

The present invention discloses a method of measuring longitude deformation of blades. The radiation and rotation speed of the blade are collected by an optical probe and a synchronized rotation sensor. The stretch of the blade is able to be determined by the obvious change in the light intensity detected by the optical probe. The precision servo motor keeps driving the optical probe to move upward. The collected radiation is compared with the radiation collected on the previous point. The stretch of the blade is calculated based on position of the blade tip which is determined by the time when the high level radiation from the blade is disappeared. The longitude deformation of the blade is calculated by plugging the stretch into the deformation equation. Mapping the calculated deformation with the number of the blade calculated with rotation speed synchronizing signals to achieve the deformation of all the blades.