一种新型的双波长光电高温计

基于黑体辐射原理,设计了一种可用于金属冶炼测温的双波长光电高温计。该高温计利用和钢水达到热平衡的石英玻璃窗作为发光体,实现浸入式测温,减少了环境干扰(如灰尘、水汽等)带来的误差。通过透镜、二向分光镜、窄带滤光片、光电转换器件实现了两路光信号的传输采集和转换。设计了以ADuC812为核心进行数据采集、信号处理、温度显示的二次仪表电路。实验给出了该高温计的稳定度,验证了该检测方法的可行性。

A novel dual-wavelength photoelectric Pyrometer

Based on the principle of blackbody radiation,a dual-wavelength photoelectric pyrometer which can be used in the field of temperature measurement of metal smelting was designed.By using the silica window which achieved thermal equilibrium in the liquid steel as the luminous body,the immersion temperature measurement was carried out and errors resulting from the surrounding perturbation(i.e.,dust and vapor)were decreased.Two-way light signals were transmitted,collected and converted by using lens,beam splitters,narrowband filters and photo-detectors.Every circuit unit in the ADuC812-controlled secondary instrument,including data acquisition,signal processing,and temperature display etc,was completed.The stability of the pyrometer was tested,and the feasibility of the technology was validated.