基于光纤探头的辐射式温度测量系统的研究

Research on radiation temperature measurement system based on fiber optic probe

温度测量在材料、航空航天和能源等领域至关重要。传统测温方法和多数光纤传温度感器在实际现场应用中受到很大限制,无法满足宽范围、高精度的测量要求。本文研制了基于物体辐射理论的光纤亮度、比色式测温仪,采用单根或多根光纤作为温度探头,可应用于复杂环境的非接触温度测量。采用窄带干涉滤光器,实现300～2 000℃的亮度及比色式温度非接触高精度测量,温度分辨率达0.1℃,精度达0.5%。实验表明该测温仪能有效抑制测量通道中各类干扰影响,提高了测量范围和精度,为快速温度测量提供了新的方法。

Temperature measurement is critical in the fields of materials, aerospace and energy. Traditional temperature measurement methods and most fiber optic temperature sensors are greatly limited in practical field applications, which cannot meet the requirements of wide-range, high-precision measurement. In this paper, the luminance and colorimetric thermometer based on the theory of object radiation was developed, which using a single or multiple optical fiber as a temperature probe. It can be applied to the non-contact measurement of complex environment. The narrow band interference filter is used for the thermometer, achieving the non-contact and high precision measurement of luminance and colorimetric at 300~2000℃. The temperature resolution is 0.1℃ and the accuracy is 0.5%. The experiments show that the thermometer can effectively inhibit various types of interference of the measurement channel, which improves the measurement range and accuracy, and provides a new method for rapid temperature measurement.