Improving coal/gangue recognition efficiency based on liquid intervention with infrared imager at low emissivity
Improving coal/gangue recognition efficiency based on liquid intervention with infrared imager at low emissivity
复制标题
低发射率红外成像仪液体干预提高煤/矸石识别效率
DOI：
10.1016/j.measurement.2021.110445
复制
发表时间：
2022-01-20
期刊：
影响因子：
5.6
通讯作者：
Cheng, Dongliang
中科院分区：
文献类型：
--
作者：
Zhang, Jinwang;Han, Xing;Cheng, Dongliang
煤、矸石的准确识别是综放开采实现智能化的核心技术。本文考虑了热像仪发射率对煤/矸石识别效率的影响。采用不同发射率的红外热像仪测量煤和矸石的温度。结果表明：与高发射率条件相比，低发射率条件可以增大煤与矸石的实测温差，从而大大提高识别效率。低发射率（ε=0.1-0.3）液体介入实验中最大温差达到4.5℃-4.8℃。将红外热像仪的发射率设置在较低水平可能是扩大煤与矸石温差的新途径，将大大提高识别效率。当epsilon = 0.3时，最大温差比达到9.0，这表明红外热像仪在低发射率下提高煤/矸石识别效率的最佳潜力。
Accurate recognition of coal and gangue is the core technology to realize intelligence in fully mechanized top coal caving mining. The influence of emissivity of the thermal imager on the efficiency of the coal/gangue recognition is considered in this paper. The temperature of coal and gangue are measured by the infrared thermal imager with different emissivity. The results show that: compared with high emissivity, low emissivity conditon can enlarge the measured temperature difference between coal and gangue, which will improve the recognition efficiency greatly. The maximum temperature difference reaches 4.5 degrees C-4.8 degrees C in liquid intervention experiment with low emissivity (epsilon = 0.1-0.3). Setting the emissivity of infrared thermal imager at a low level may be a new approach to widen the temperature difference between coal and gangue, which will improve the recognition efficiency greatly. When epsilon = 0.3, the maximum temperature difference ratio reaches 9.0, which shows the best potential for improving coal/gangue recognition efficiency with infrared thermal imager at low emissivity.