Selection of emission frequency for moisture measurement in coal by microwave power attenuation

LIU Haiyu; TAN Houzhang; FAN Baoguo; JIN Yan

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Selection of emission frequency for moisture measurement in coal by microwave power attenuation

更新时间：2025-09-28

- Selection of emission frequency for moisture measurement in coal by microwave power attenuation
- Thermal Power Generation Vol. 43, Issue 6, Pages: 136-140(2014)
- 作者机构：
  
  1. 太原理工大学电气与动力工程学院
  2. 西安交通大学能源与动力工程学院
- 作者简介：
- 基金信息：
- DOI：
  CLC： TQ533
- Published：2014
- 稿件说明：
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LIU Haiyu, TAN Houzhang, FAN Baoguo, et al. Selection of emission frequency for moisture measurement in coal by microwave power attenuation[J]. Thermal power generation, 2014, 43(6): 136-140.
DOI：

LIU Haiyu, TAN Houzhang, FAN Baoguo, et al. Selection of emission frequency for moisture measurement in coal by microwave power attenuation[J]. Thermal power generation, 2014, 43(6): 136-140. DOI：

摘要

通过搭建1~4GHz宽频率微波实验台

测定了6种煤的微波功率衰减对煤质水分变化的响应特性。结果表明:采用微波功率衰减法测量煤质水分时

在频率≥3.5GHz下

煤的含水量变化与微波衰减近似为二次曲线关系

并且随着频率升高

拟合精度相差不大;选择较低的频率可以测量较大含水量和较厚的煤样

实际应用中可根据需要选取合适的频率。

Abstract

A microwave instrument was designed to determine the moisture content in coal with a wide emission frequency ranging from 1 to 4GHz.The response character of microwave power attenuation to moisture content in six kinds of coal showed that when the frequency was larger than 3.5GHz

the response curve of microwave power attenuation to moisture content could be described as conic equation.As the frequency increases

the fitting precision trends to be closer.However

a relative low frequency can be more capable of determining coal with large moisture content and thickness.In real-world usage

we can select the optimal frequency according to requirements.

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