Lubrication interface molecule Raman spectrum online measurement apparatus and measurement method
A Raman spectroscopy and measuring device technology, which is applied to the on-line measuring device and measuring field of molecular Raman spectroscopy of lubrication interface, can solve the problem that real-time online acquisition of molecular Raman spectroscopy of lubricating interface cannot be realized, signals cannot be collected Raman spectrum, and signals cannot be collected. Problems such as long time
Active Publication Date: 2016-12-07
TSINGHUA UNIV
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[0003] However, the thickness of the lubricating film formed under low-speed conditions is usually only tens to hundreds of nanometers. At this time, the Raman scattering cross section of the lubricant molecules is small, and it takes a long time to collect the signal. Sometimes the signal is too weak to be submerged in the noise. Moderate and unable to collect effective Raman spectra
The existing on-line measurement device and method for the Raman spectrum of the lubricating interface molecules cannot realize the real-time online collection of the Raman spectrum of the lubricating interface molecules
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[0025] The on-line measurement device 100 for lubricating interface molecules Raman spectroscopy provided by the present invention will be further described in detail below with reference to the drawings and specific embodiments.
[0026] see figure 1 , the lubricating interface molecular Raman spectrum online measuring device 100 provided by the present invention comprises a laser 10, a half-wave plate 20, a half-transparent mirror 30, an upper friction pair 40, a lower friction pair 50, a spectrometer 60, and a display Micro Imaging System 70 .
[0027] The wavelength of the laser light 10 is preferably 480-750 nm.
[0028] The half-wave plate 20 is arranged on the optical path of the laser 10 , and by rotating the half-wave plate 20 , polarized laser light with different polarization directions can be obtained.
[0029] The half-mirror 30 is arranged behind the half-wave plate 20 and is used to change the propagation direction of the laser light 10 so as to focus the lase...
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Abstract
The invention relates to a lubrication interface molecule Raman spectrum online measurement apparatus. The apparatus comprises a laser, a half-wave plate, a semi-reflection mirror, an upper friction pair, a lower friction pair, a microscopic imaging system and a spectrometer, the lower friction pair comprises a substrate and a surface-enhanced Raman film, the surface-enhanced Raman film is arranged on the surface of the upper friction pair close to a substrate, and the surface of the substrate close to the upper friction pair is a convex surface. The invention also relates to a lubrication interface molecule Raman spectrum online measurement method. The measurement apparatus and the measurement method can reduce the online acquisition time of the Raman spectrum of a lubrication interface molecule to millisecond level, and allows the intensity of the acquired Raman signal to be 10<4> times that of signals acquired by common lower friction pairs under same lubrication conditions.
Description
technical field [0001] The invention relates to an on-line measuring device and a measuring method for the molecular Raman spectrum of a lubricating interface, in particular to an on-line measuring device and a measuring method for a point-contact lubricating interface molecular Raman spectrum. Background technique [0002] In the on-line monitoring experiment of the lubrication film, the rich real-time Raman spectrum is an important basis for studying the evolution of the molecular structure of lubrication and the microscopic mechanism of lubrication during the friction process. [0003] However, the thickness of the lubricating film formed under low-speed conditions is usually only tens to hundreds of nanometers. At this time, the Raman scattering cross section of the lubricant molecules is small, and it takes a long time to collect the signal. Sometimes the signal is too weak to be submerged in the noise. However, an effective Raman spectrum cannot be collected. The exis...
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Login to View More IPC IPC(8): G01N21/65
CPCG01N21/658
Inventor 马丽然高明雒建斌
Owner TSINGHUA UNIV