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:
Sep. 07, 2021
Filed:
Nov. 01, 2016
Applicant:
Neubrex Co., Ltd., Kobe, JP;
Inventors:
Assignee:
NEUBREX CO., LTD., Kobe, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01N 21/63 (2006.01); G01B 11/16 (2006.01); G01D 5/353 (2006.01); G01K 11/32 (2021.01); G01K 11/322 (2021.01);
U.S. Cl.
CPC ...
G01N 21/636 (2013.01); G01B 11/16 (2013.01); G01D 5/35364 (2013.01); G01K 11/32 (2013.01); G01K 11/322 (2021.01); G01N 2021/638 (2013.01);
Abstract
In a measurement requiring a high space resolution using S-BOTDR, a pulse train composed of a plurality of pulses having the interval between the pulses longer than the phonon lifetime is interpulse-code-modulated. A Golay code is used for the interpulse code modulation to eliminate the sidelobes of the correlation in using a technique of correlation. In a technique without using correlation, an Hadamard matrix is used for the interpulse code modulation and the resultant matrix is inverted in the signal processing.