基于水传热和红外热成像的煤矸识别方法

程刚; 陈杰; 潘泽烨; 魏溢凡; 陈森森

doi:10.13272/j.issn.1671-251x.2023050056

基于水传热和红外热成像的煤矸识别方法

doi: 10.13272/j.issn.1671-251x.2023050056

程刚^{1, 2,},
陈杰^{1, 2, ,},
潘泽烨²,
魏溢凡²,
陈森森²

1.
安徽理工大学深部煤矿采动响应与灾害防控国家重点实验室，安徽淮南　232001
2.
安徽理工大学机械工程学院，安徽淮南　232001

基金项目: 安徽省高校协同创新项目（GXXT-2021-076）；煤炭安全精准开采国家地方联合工程研究中心研究项目（EC2021010）。

详细信息

作者简介:
程刚（1986—），男，安徽桐城人，副教授，博士，研究方向为煤矿智能开采，E-mail：chgmech@mail.ustc.edu.cn

通讯作者:
陈杰（1997—），男，安徽铜陵人，硕士研究生，研究方向为矿山机电工程，E-mail:ChenJie7197@163.com。

中图分类号: TD67
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出版历程
- 收稿日期: 2023-05-17
- 修回日期: 2024-01-18
- 网络出版日期: 2024-01-31

Coal gangue recognition method based on water heat transfer and infrared thermal imaging

CHENG Gang^{1, 2
,},
CHEN Jie^{1, 2
, ,},
PAN Zeye²,
WEI Yifan²,
CHEN Sensen²

1.
State Key Laboratory of Mining Response and Disaster Prevention and Control in Deep Coal Mines, Anhui University of Science and Technology, Huainan 232001, China
2.
School of Mechanical Engineering, Anhui University of Science and Technology, Huainan 232001, China

摘要

摘要: 基于可见光图像的煤矸识别方法准确率不高、识别速度慢；基于高能射线透射的煤矸识别方法具有很大辐射导致较少应用。红外热成像具有穿透性强、不受光线影响等优点，但煤和矸石的表面温度在室温下相对接近，导致煤和矸石在红外热图像中没有明显差异，难以获得较好的识别效果。针对上述问题，提出了一种基于水传热和红外热成像的煤矸识别方法。在不同水温（18，21，24，27，30 ℃）条件下进行煤和矸石红外热成像实验，通过煤和矸石红外热图像和温度变化之间的差异来区分煤和矸石。实验结果表明：不同水温下煤和矸石红外热图像不同，当水温低于环境温度时，煤和矸石红外热图像之间的差异较大；在相同水温条件下，煤和矸石红外热图像之间的差异随着时间增加逐渐增大；煤和矸石表面温度变化均随水温升高和时间增加呈增大趋势，但矸石表面温度变化大于煤表面温度变化；当水温为18 ℃、时间为180 s时，煤和矸石红外热图像之间差异和温差均达到最大。这说明低温的水可作为一种传热介质，更有利于使煤和矸石之间产生较大的温差，从而实现煤和矸石红外热图像准确、快速识别。
- 煤矸识别 /
- 水传热 /
- 红外热成像 /
- 红外热图像 /
- 温差
Abstract: The coal gangue recognition method based on visible light images has low accuracy and slow recognition speed. The coal gangue recognition method based on high-energy ray transmission has significant radiation, resulting in limited application. The infrared thermal imaging has advantages such as strong penetration and no influence from light. But the surface temperature of coal and gangue is relatively close at room temperature, resulting in no significant difference between coal and gangue in infrared thermal images, making it difficult to achieve good recognition results. In order to solve the above problems, a coal gangue recognition method based on water heat transfer and infrared thermal imaging is proposed. The method conducts infrared thermal imaging experiments on coal and gangue under different water temperatures (18, 21, 24, 27, 30 ℃). The method distinguishes between coal and gangue based on the differences in infrared thermal images and temperature changes. The experimental results show that the infrared thermal images of coal and gangue are different at different water temperatures. When the water temperature is lower than the ambient temperature, there is a significant difference between the infrared thermal images of coal and gangue. Under the same water temperature conditions, the difference between the infrared thermal images of coal and gangue gradually increases with time. The surface temperature changes of coal and gangue both show an increasing trend with the increase of water temperature and time. But the surface temperature changes of gangue are greater than those of coal. When the water temperature is 18℃ and the time is 180 s, the difference and temperature difference between the infrared thermal images of coal and gangue reach their maximum. This indicates that low-temperature water can serve as a heat transfer medium, which is more conducive to creating a large temperature difference between coal and gangue. The accurate and rapid recognition of coal and gangue infrared thermal images can be achieved.
- coal gangue recognition /
- water heat transfer /
- infrared thermal imaging /
- infrared thermal image /
- temperature difference

HTML全文

图 1 红外热成像原理

Figure 1. Principle of infrared thermal imaging

下载: 全尺寸图片幻灯片

图 2 煤矸红外热成像实验系统

Figure 2. Experimental system of coal and gangue infrared thermal imaging

下载: 全尺寸图片幻灯片

图 3 不同水温下不同时刻的煤和矸石红外热图像

Figure 3. Infrared thermal images of coal and gangue under different water temperatures and time

下载: 全尺寸图片幻灯片

图 4 不同水温下煤和矸石表面温度变化曲线

Figure 4. Surface temperature variation curves of coal and gangue under different water temperatures

下载: 全尺寸图片幻灯片

图 5 煤和矸石表面温度变化与水温和时间的关系

Figure 5. Surface temperature variation of coal and gangue in relation to water temperature and time

下载: 全尺寸图片幻灯片

图 6 不同水温下煤和矸石表面温度变化的均值和方差

Figure 6. Mean and variance of surface temperature variation of coal and gangue under different water temperatures

下载: 全尺寸图片幻灯片

图 7 不同水温下煤和矸石表面温差

Figure 7. Surface temperature difference between coal and gangue under different water temperatures

下载: 全尺寸图片幻灯片

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