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. 06, 2021
Filed:
Jun. 17, 2019
Laser Institute of Shandong Academy of Science, Jining, CN;
Ying Shang, Ji'nan, CN;
Chen Wang, Ji'nan, CN;
Chang Wang, Ji'nan, CN;
Jiasheng Ni, Ji'nan, CN;
Chang Li, Ji'nan, CN;
Wenan Zhao, Ji'nan, CN;
Bing Cao, Ji'nan, CN;
Sheng Huang, Ji'nan, CN;
Xiaohui Liu, Ji'nan, CN;
Yingying Wang, Ji'nan, CN;
Laser Institute of Shandong Academy of Science, Jining, CN;
Abstract
The present invention provides an event positioning method, device and application in a distributed fiber vibration monitoring system. When a location at which an event occurs in a sensing fiber is to be positioned, an interference field signal having a maximum optical power is obtained by comparing optical powers of respective interference field signals corresponding to backward Rayleigh scattering lights that are generated when a pulse light is transmitted in the sensing fiber. Subsequently, a sensing location of the interference field signal having the maximum optical power is calculated. Finally, the location at which the event occurs in the sensing fiber is determined, according to the sensing location and a location distribution pattern of the event. According to the positioning method provided in the present invention, by screening the interference field signals and then calculating the event location, the spatial resolution is not determined merely by the pulse width of the optical signal. Therefore, the location positioning of the event can be more accurate, thereby improving an accuracy of the spatial resolution.