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摘要:
本文提出了一种高倍汇聚辐射光斑能流分布测量新方法，采用辐射能流传感器测量光斑不同位置的能流密度，通过多项式拟合光斑不同位置的灰度与能流密度标定曲线，最终获得辐射光斑的能流分布，并详细阐述了辐射光斑能流分布的测量原理。为了验证测量方法的准确性和可行性，进行了高倍汇聚辐射光斑能流分布测量实验，并与辐射能流传感器测量结果进行比较。结果表明：该测量方法的测量结果与辐射能流传感器的直接测量结果一致，测量偏差小于0.54%，通过分析得出该测量方法的测量不确定度为4.35%，测量准确度较传统测量方法有所提高，满足实际应用需求。
Abstract:A new method for measuring the flux distribution of a high-magnification convergent radiation spot is proposed. A radiation flux sensor is used to measure the flux density at different positions of the spot, and the calibration curve of the grayscale and flux density at different positions of the spot is fitted by a polynomial, and finally the flux distribution of the radiation spot is obtained and its principle is also elaborated. In order to verify the accuracy and feasibility of the measurement method, a high-magnification convergent radiation spot flux distribution measurement experiment is carried out, and the results are compared with the direct measurement results from the radiant flux sensor. The results show that the measurement results of the proposed method are consistent with the direct measurement results, and the average deviation is less than 0.54%. Through analysis, the measurement uncertainty of this measurement method is 4.35%, and the measurement accuracy is higher than the traditional measurement method. The experimental results indicate that the proposed method can meet the needs of practical applications.
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Key words:
- measurement system /
- radiation spot /
- flux distribution /
- photogrammetry /
- flux density
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图 1 辐射光斑能流分布测量系统原理
Figure 1. Measurement principle of radiation spot heat flux distribution
图 2 光斑多个位置辐射能流密度测量原理
Figure 2. Measurement principle of radiation flux distribution of spot at different positions
图 5 辐射能流传感器测量结果与传统间接测量结果比较
Figure 5. Comparison of measurement results of radiant flux sensor with traditional indirect measurement results
图 7 传统间接测量结果、辐射能流传感器直接测量结果和多项式标定测量结果比较
Figure 7. Comparison of traditional indirect measurement, direct measurement and polynomial calibration measurement results
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