Laser & Optoelectronics Progress, Volume. 62, Issue 15, 1528001(2025)
Study on Fine Detection of Coal Moisture Content by High-Sensitivity Wireless Sensing
Coal moisture content is an important index for evaluating coal quality and environmental governance results. Excessive coal moisture content can reduce coal quality, and insufficient coal moisture content can produce a large amount of coal dust and pollute the environment. In this study, non-Hermitian singularities in a second-order parity-time (PT)-symmetric system are used to study and analyze the moisture content of coal, and small changes in the moisture content are observed using the difference between the dielectric constants of water and coal. Compared with the traditional passive wireless sensor, the second-order PT-symmetric passive wireless sensing system improves detection sensitivity, generating a smaller error of less than 0.05% compared with the drying method. Compared with other detection technologies, this system has the advantages of online measurement of coal moisture content, good real-time performance, and high safety, which has certain significance for improving coal quality and the safety of the coal industry.
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Lina Chen, Zhenyu Liang, Yuanhong Meng, Caixia Feng, Xiaoqiang Su, Lijuan Dong. Study on Fine Detection of Coal Moisture Content by High-Sensitivity Wireless Sensing[J]. Laser & Optoelectronics Progress, 2025, 62(15): 1528001
Category: Remote Sensing and Sensors
Received: Jan. 6, 2025
Accepted: Feb. 4, 2025
Published Online: Jul. 16, 2025
The Author Email: Lijuan Dong (donglijuan_2012@163.com)
CSTR:32186.14.LOP242386