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叙述了采用谱线绝对强度法测量均匀火焰温度的基本原理。当分光仪器所区分的光谱区间小于谱线的半宽度时,可以测出谱线的绝对强度与吸收系数,借助于维恩公式计算出火焰温度的测量值。详述光导纤维与测量对象的耦合,推出有关公式,用以计算所用透镜的焦距与直径。文中介绍采用光导纤维光路与微机测量火焰温度的系统,该系统可以实现在磁流体发电机发电过程中火焰温度的实时测量。文中还给出发电输出功率与火焰温度的测量值。
The basic principle of measuring the uniform flame temperature by using the line absolute intensity method is described. When the spectral range of the spectrometer is less than the half-width of the spectral line, the absolute intensity and absorption coefficient of the spectral line can be measured and the measurement of the flame temperature can be calculated by means of Wien’s formula. The coupling between the optical fiber and the object of measurement is described in detail, and the formula is introduced to calculate the focal length and diameter of the lens used. In this paper, the system of optical fiber optical path and microcomputer measuring flame temperature is introduced. The system can realize the real - time measurement of flame temperature in the process of power generation of magnetohydrodynamic generator. Also given in the paper power output and flame temperature measurement.