The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 13, 2024
Filed:
Oct. 20, 2022
Xi'an Jiaotong University, Shaanxi, CN;
Zhibo Yang, Shaanxi, CN;
Jiahui Cao, Shaanxi, CN;
Xuefeng Chen, Shaanxi, CN;
Zengkun Wang, Shaanxi, CN;
Laihao Yang, Shaanxi, CN;
Shaohua Tian, Shaanxi, CN;
Haoqi Li, Shaanxi, CN;
Wenbo Li, Shaanxi, CN;
XI'AN JIAOTONG UNIVERSITY, Xi'an, CN;
Abstract
The present disclosure discloses a method for extracting a natural frequency difference between blades by a single blade tip timing sensor or uniformly distributed blade tip timing sensors. The method includes the following steps: acquiring actual arrival time of a rotating blade by using a single blade tip timing sensor or uniformly distributed blade tip timing sensors, and converting a difference between theoretical arrival time and the actual arrival time into displacement data of a blade tip according to a rotational speed and a blade length of the rotating blade; selecting displacement data of blade tips of two rotating blades with the same blade length at the same rotational speed; intercepting the displacement data, performing discrete Fourier transform respectively, and making a sampling frequency approximate to an average rotational speed to obtain spectrum data.