论述了视觉传感技术的特点和研究现状。针对镀铬层固态表面传热及光路特点,选取了普通CCD摄像机,利用固态表面对电弧的反射光和加热工件自身的辐射光,在近红外波段取像的视觉采集方法。结合近红外光谱特点和CCD摄像机的光谱响应度变化趋势,在980 nm波长的窗口区域提取到了清晰的视觉图像。分析了镀铬层固态表面等离子束流加热区图像的成像机理,在对加热区图像特征进行分析的基础上对图像进行了处理,提取出了有效信息。 Discusses the characteristics and research status of visual sensing technology. Aiming at the solid - state heat transfer and optical path characteristics of chrome - plated layer, a general CCD camera was selected. The visual acquisition method of taking images in the near - infrared wave band was given by using the reflection of the solid surface on the arc and the radiation of the workpiece. Combined with the characteristics of near-infrared spectroscopy and the trend of spectral responsivity of CCD camera, a clear visual image was extracted in the window region of 980 nm wavelength. Based on the analysis of the image features in the heating zone, the image was processed and the effective information was extracted.