爆炸温度场三维测量技术研究

发布时间：2018-06-30 01:13

本文选题：爆炸温度场 + 多光谱测温　；参考：《西安工业大学》2017年硕士论文

【摘要】：随着科技的进步,许多领域的发展对温度测量提出了更高要求,从以往的单点温度测量逐步过渡到了三维温度场的测量,温度场测量与武器系统研发、弹药毁伤效能、爆炸过程研究及炸药原材料配比最佳值等都密切相关。特别是瞬态高温场往往具有强破坏力、强电磁干扰、爆炸过程极短、温度高、温度动态范围大等特点,因此测量难度较大,目前尚没有相应的测试技术及设备,本文针对爆炸温度场进行了三维测量技术的研究。针对爆炸温度瞬时性的特点,本文提出了一种新的点面结合测量三维温度场的方法,采用硅光电探测器结合多光谱测温法测量爆炸真温以及光谱发射率,实现温度场的单点温度测量。结合面阵CCD由靶面输出响应得出单一方向上的二维温度分布,以爆源为中心采用三个测量方向均布的方法得出三个方向上的二维温度分布,研究基于三个方向上的二维温度分布重建温度场的方法。本文建立由点温度到面温度的数学模型,其中包括大气光谱透过率及CCD光谱响应曲线的测量。首先用MODTRAN大气模拟软件仿真出大气光谱透过率曲线,并在标定公式的基础上用光栅单色仪得出CCD光谱响应曲线,然后采用最小二乘法对两者进行曲线拟合分别得出大气光谱透过率函数及CCD光谱响应函数,建立起二维温度分布的测温模型。其次研究了几种常用的迭代类重建算法,在此基础上采用了一种综合多准则的迭代重建算法。建立了基于透镜成像原理的相机投影模型,并给出了权重矩阵的计算方法。利用计算机仿真实验对所采用的多准则迭代重建算法与常用重建算法进行比较,表明了该算法在物理场的三维重建中有很好的应用前景。
[Abstract]:With the development of science and technology, the development of many fields has put forward higher requirements for temperature measurement, from the former single point temperature measurement to three-dimensional temperature field measurement, temperature field measurement and weapon system research and development, ammunition damage effectiveness, The study of explosion process and the optimum ratio of explosive raw materials are closely related. Especially, the transient high temperature field often has the characteristics of strong destructive power, strong electromagnetic interference, short explosion process, high temperature and large dynamic range of temperature, so it is difficult to measure, and there is no corresponding testing technology and equipment at present. In this paper, the three-dimensional measurement technology of explosion temperature field is studied. According to the characteristics of instantaneous explosion temperature, a new method of measuring 3D temperature field with point-surface combination is proposed in this paper. The real temperature and spectral emissivity of explosion are measured by silicon photodetector combined with multispectral thermometry. The single point temperature measurement of temperature field is realized. The two-dimensional temperature distribution in a single direction is obtained by combining the output response of a plane array CCD from the target surface, and the two-dimensional temperature distribution in three directions is obtained by using the method of uniform distribution of the three measuring directions with the explosion source as the center. The method of reconstructing temperature field based on two-dimensional temperature distribution in three directions is studied. In this paper, a mathematical model from point temperature to surface temperature is established, including the measurement of atmospheric spectral transmittance and CCD spectral response curve. Firstly, the atmospheric spectral transmittance curve is simulated by MODTRAN atmospheric simulation software, and the CCD spectral response curve is obtained by grating Monochromator on the basis of calibration formula. Then the least square method is used to fit the curves of the two methods, and the atmospheric spectral transmittance function and the CCD spectral response function are obtained, respectively, and the temperature measurement model of two-dimensional temperature distribution is established. Secondly, several commonly used iterative class reconstruction algorithms are studied, and an iterative reconstruction algorithm which synthesizes multiple criteria is adopted. The camera projection model based on lens imaging principle is established, and the calculation method of weight matrix is given. The multi-criteria iterative reconstruction algorithm is compared with the commonly used reconstruction algorithm by computer simulation, which shows that the algorithm has a good application prospect in the three-dimensional reconstruction of physical field.
【学位授予单位】：西安工业大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TJ410.6;TP391.41

【参考文献】