Device for observing laser-induced heat convection in SBS-PCM (styrene butadiene styrene-pulse code modulation) in real time based on schlieren method

By employing collinear propagation of probe and pump beams within the SBS-PCM, combined with a schlieren imaging system and multidimensional visualization methods, the problem of non-invasive, real-time, and quantitative observation of transient thermal convection fields inside the SBS-PCM was solved, achieving high spatiotemporal resolution thermal convection field measurement and device optimization.

CN122329622APending Publication Date: 2026-07-03HEBEI UNIV OF TECH
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Patent Information

Application Number
CN202610447580.1
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-04-07
Publication Date
2026-07-03

AI Technical Summary

Technical Problem

Existing technologies make it difficult to perform non-invasive, real-time, and quantitative observations of the internal transient thermal convection field of SBS-PCM under actual working conditions, especially under strong pump laser background noise, making it difficult to effectively extract weak detection signals.

Method used

By employing the schlieren method, the probe light and pump light are set to propagate collinearly within the medium pool. The schlieren imaging system receives the probe light carrying refractive index gradient information in real time, and the data is processed using multidimensional visualization methods to comprehensively reveal the intensity, morphology, and directional characteristics of the thermal flow field.

Benefits of technology

It enables non-invasive full-field measurement of the internal thermal convection field of SBS-PCM, improves the signal-to-noise ratio, captures transient thermal convection processes on the order of microseconds, provides quantitative observation methods, and supports device optimization.

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Abstract

The invention relates to a device for real-time observation of laser induced heat convection in SBS-PCM based on a schlieren method, belongs to the technical field of optical laser measurement, and is used for solving the problem that non-intrusive, real-time and quantitative observation of a transient heat convection field in the SBS-PCM is difficult in the prior art. The device comprises a pump light source, an energy adjusting system, an optical isolation system, a light beam separation system, a reflection focusing system, a detection light source, a beam expanding collimation system, an SBS phase conjugate mirror and a schlieren imaging system. The beneficial effects of the invention are that the detection light and the pump light are designed to be collinearly propagated in the medium pool, so that the schlieren imaging system and the pump light source are synchronously triggered, the detection light carrying refractive index gradient information can be received in real time, data are processed in real time in combination with a multi-dimensional visualization method, and the accuracy of the detection light is improved. And the strength, form and direction characteristics of the heat flow field are comprehensively revealed.
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