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. 20, 2021
Filed:
Oct. 14, 2019
National Institute of Metrology, China, Beijing, CN;
Beijing University of Chemical Technology, Beijing, CN;
Chenguang Cai, Beijing, CN;
Ming Yang, Beijing, CN;
Zhihua Liu, Beijing, CN;
Hao Cheng, Beijing, CN;
Cuiyun Jin, Beijing, CN;
National Institute of Metrology, Beijing, CN;
Beijing University of Chemical Technology, Beijing, CN;
Abstract
A method for calibrating phase-frequency characteristics of low frequency accelerometer based on time-spatial synchronization, comprises: measuring excitation displacement of the low frequency accelerometer to realize excitation acceleration measurement of the low frequency accelerometer; realizing alignment of the excitation acceleration signal of the low frequency accelerometer with output voltage signal of the low frequency accelerometer in the spatial domain based on TSS technology, fitting the excitation acceleration signal and the output voltage signal respectively by SAM, and calculating phase φof the excitation acceleration signal at a zero position of horizontal long-stroke shaker and phase φof the output voltage signal at the time when a zero encoder on the shaker outputs pulse; and calculating the sensitivity phase of the low frequency accelerometer with φand φ, and determining phase-frequency characteristics of the low frequency accelerometer by calibrating the sensitivity phases at different frequencies.