高温场三维温度分布能量谱探测与多目标迭代成像方法

在航空、航天、化爆、核爆等研究领域，瞬态高温场的测量占有重要地位。尽管目前已经有很多适用于不同温度范围和响应速度的测温传感器，但该领域因高温、高压、高冲击的极端环境以及测温传感器感温件的滞后和有限热传导、测温范围受限等原因，存在测不了、测不准、活不了等难题，是目前瞬态高温传感技术突破发展所面临的瓶颈。本项目研究一种高温场瞬时温度分布的三维探测成像技术，为极端环境瞬态高温场温度的精准测试奠定基础。首先使用激光诱导击穿光谱理论研究瞬态高温场内部特征元素热激发光谱特性，实现三维瞬态热-光辐射积分投影的光学信息探测；其次探究元素特征能量谱的高温场节点辐射、衰减和接收特性，构建非准直投影积分光学优化模型；最后基于多路投影全局探测理论与多目标优化原理，解决三维温度场非层析迭代成像关键问题，实现从点温度向面温度到体温度测量的演变，为获取高温场瞬时高精度三维温度分布模型及温度场演变规律提供技术支撑。

In the fields of aviation, aerospace, chemical explosion, nuclear explosion and other fields, the measurement of transient high temperature field occupies an important position. Although there are many temperature sensors suitable for different temperature ranges and response times, the extreme environment with high temperature, high pressure and high impact, as well as the hysteresis and limited thermal conduction and limited temperature range of temperature measurement sensors, there are problems such as inability to measure, inaccurate, and unable to survive, which are the bottlenecks in the breakthrough process of transient high temperature sensing technology. This project studies a 3-D detection imaging technique of the transient temperature distribution in high temperature field, which lays a foundation for accurate testing of high temperature field temperature in extreme environments. First, the thermal excitation spectral characteristics of the internal special elements of the transient high temperature field are studied by laser-induced breakdown spectroscopy theory, and the optical information detection of three-dimensional transient thermal-optical radiation integral projection is realized. In addition, the emission, attenuation and reception characteristics of node elements special energy spectrum in high temperature field are explored, and the integral optical optimization model of non-alignment projection is constructed. Finally, based on the theory of multi-directional projection global detection and multi-objective optimization, the key problem of non-tomographic iterative imaging of 3-D temperature field is realized. It provides a technical support for obtaining the high temperature field transient high-precision 3-D temperature distribution model and the law of temperature field evolution.