A temperature measuring device with cars and tdlas collinear
A temperature measuring device and collinear technology, applied in the field of joint diagnosis system using CARS technology and TDLAS technology, can solve problems such as inconsistencies in detection areas, achieve the effect of reducing complexity and avoiding damage
Active Publication Date: 2016-03-30
NORTHWEST INST OF NUCLEAR TECH
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Problems solved by technology
[0007] The present invention is to provide a collinear temperature measuring device of CARS technology and TDLAS technology, which solves the problem of inconsistency in the detection areas of the two in joint temperature measurement, makes TDLAS technology laser pass through the detection point of CARS technology, and reduces the complexity of the measurement system at the same time degree, so that the two share the transmitter and receiver
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[0032] The device of the present invention mainly adopts two dichromatic mirrors——input dichromatic mirror 2 and output dichromatic mirror 10 pairs of TDLAS technology laser ω LD and CARS Technology Stokes Light Omega s Combining beams and splitting beams, using beam shaping mirror 3 and spatial filter 6 to pair the pump light ω of CARS technology p and Stokes light ω s Perform beam combining and splitting.
[0033] Such as image 3 As shown, the device of the present invention is mainly composed of an optical fiber collimator 1, an input dichroic mirror 2, a beam shaping mirror 3, an incident lens 4, a collecting lens 5, a spatial filter 6, a CARS filter 7, a coupling lens 8, and a CARS detector 9. It is composed of output dichromatic mirror 10, TDLAS filter 11, TDLAS detector 12 and other components. Among them, the labeled devices 1 to 9 are along the main optical path 15, namely ω LD The laser directions are arranged in sequence; input dichroic mirror 2, beam shaping ...
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Abstract
The invention discloses a CARS and TDLAS collinear temperature measuring device, which comprises a CARS unit, a TDLAS unit, an input dichromatic mirror, a spatial filter and an output dichromatic mirror. The invention adopts the input dichromatic mirror and the output dichromatic mirror to combine and split the TDLAS technology laser ωLD and the CARS technology Stokes light ωs, and adopts the beam shaping mirror and the spatial filter to combine and split the CARS technology pump light ωp and Stokes light Siguang ωs performs beam combining and splitting, which realizes the sharing of the transmitting end and receiving end of the two sets of measurement units, reduces the complexity of the measurement system, and avoids the impact of the powerful ωp and ωs lasers on the filters and detectors of TDLAS technology. damage. It provides parameters with different time resolutions and different measurement precisions for the analysis of temperature field parameters, and is also conducive to the comparison and verification of data between the two measurement systems.
Description
technical field [0001] The invention relates to a laser comprehensive diagnosis system for flow field parameters, in particular to a combined diagnosis system utilizing CARS technology and TDLAS technology. Background technique [0002] CARS (CoherentAnti-StokesRamanScattering) technology, that is, coherent anti-Stokes Raman scattering technology. It is a third-order nonlinear laser spectroscopy technique, that is, the pump light ω p and Stokes light ω s Focus on the detection area in a phase-matched angle, interact with the detection medium and generate anti-Stokes light (CARS signal) in a four-wave mixing manner, and invert by measuring the intensity and spectral line shape of the CARS signal To detect the temperature, concentration and other parameter information of the medium, the CARS technology is a single-point measurement technology. [0003] figure 1 The measurement optical path and device schematic diagram of USED (Unstable-resonatorSpatiallyEnhancedDetection) ...
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IPC IPC(8): G01N21/25G01N21/39G01K13/00
Inventor 陶波王晟叶景峰李国华胡志云赵新艳
Owner NORTHWEST INST OF NUCLEAR TECH