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:
Jul. 15, 2025
Filed:
Jan. 08, 2025
Xiaoling LI, Beijing, CN;
Shusheng Zhang, Beijing, CN;
Wanzhang Wang, Beijing, CN;
Abstract
Provided is an online fault diagnosis method for a solenoid valve based on analysis of time-frequency domain characteristics, which relates to the technical field of solenoid valve fault diagnosis. The online fault diagnosis method for a solenoid valve based on analysis of time-frequency domain characteristics includes: acquiring timing current data of a solenoid valve drive end, and performing time domain analysis and frequency domain analysis to obtain time domain and frequency domain feature vectors, respectively, and combining the time domain and frequency domain feature vectors to obtain a complex time-frequency domain feature vector; acquiring a plurality of sets of labeled complex feature vectors by changing an operating state of a solenoid valve and then generating an isolated forest model for evaluation by majority voting; and finally, realizing online diagnosis on a fault mode of the solenoid valve.