Lubricant Interface Molecular Raman Spectroscopy Online Measuring Device and Measuring Method
A technology of Raman spectroscopy and measuring device, which is applied to the on-line measuring device and measuring field of molecular Raman spectroscopy of lubricating interface, can solve the problem that it takes a long time to collect signals, the Raman spectrum cannot be collected from the signal, and the molecular Raman spectroscopy of lubricating interface cannot be realized. Real-time online collection and other issues
Active Publication Date: 2019-04-02
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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IPC IPC(8): G01N21/65
CPCG01N21/658
Inventor 马丽然高明雒建斌
Owner TSINGHUA UNIV