On-line rotor and stator axial clearance measuring device based on dual-wavelength sweep frequency intensity modulation

• Main Authors: NIU GUANGYUE, JIANG JIAJIA, DUAN FAJIE, YU ZHENXIN, FU XIAO, BAO RUIJIA
• Format: Patent
• Language: Chinese; English
• Published: 08.07.2022
• Subjects: MEASURING; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS; MEASURING LENGTH, THICKNESS OR SIMILAR LINEARDIMENSIONS; PHYSICS; TESTING

The invention discloses a rotor and stator axial clearance online measurement device based on dual-wavelength sweep frequency intensity modulation. The rotor and stator axial clearance online measurement device comprises a secondary modulation light path unit, a measurement light path and reference light path unit, a sweep frequency signal generation unit and a data acquisition and processing unit, the secondary modulation light path unit is composed of a first laser, a second laser, a coupler, an isolator, a first electro-optic intensity modulator, a circulator, a first wavelength division multiplexer, a second electro-optic intensity modulator and a second wavelength division multiplexer. The data acquisition and processing unit consists of a first detector, a second detector, a first acquisition card, a second acquisition card and a PC (Personal Computer) upper computer; the method is an optical measurement method based on laser emission and optical fiber transmission, and is suitable for a measurement env