透地雷達應用於稻穀含水率量測之研究

Application of GPR on Monitoring Paddy Moisture Content

黃威仁(Wei-Jen Huang) ； 盧福明(Fu-Ming Lu) ； 楊宗淇(Tsung-Chi Yang) ； 廖忠賢(Chung-Hsien Liao)

《台灣農學會報》 10卷5期 (2009/10) Pp. 389-397

https://doi.org/10.6730/JAAT.200910_10(5).0004

摘要

本研究透過高頻透地雷達來偵測乾燥過程中稻穀含水率之變化。利用透地雷達發射雷達波並接收穿透稻穀後反射回來的訊號，藉此研究波速及穿透能量與稻穀含水率之關係。透地雷達穿透之稻穀含水率介於11%~25%之間，在90mm，120mm，150mm厚的穀層之平均波速介於0.14~0.20m/ns，而稻穀介電常數則介於2.4~4.7之間。稻穀含水率與波速之間具有線性關係，其R2達到0.97。雷達穿透能量隨穀層厚度增加而減少，隨著含水率之減少而增加。

關鍵字

透地雷達 ； 稻穀 ； 含水率 ； 雷達波速

並列摘要

High frequency GPR was used in this study to measure the moisture content of rough rice during the drying period. The radar pulse generated from GPR systems was transmitted through a packed bed and reflected from the bottom layer of rough rice. The reflected signals were used to calculate the velocity and transmitted energy of the radar wave. The average velocity and dielectric constant of the radar wave transmitting through the packed bed of rough rice moisture content between 11%-25% and thickness of 90mm, 120mm and 150mm were 0.14-0.20 m/ns and 2.4-4.7 respectively. The velocity of the radar pulse and moisture content of rough rice has a linear relationship with a coefficient of determination R2=0.97. The GPR transmitting energy decreased as the rough rice thickness increased, and increased with decreasing the moisture content of rough rice.

並列關鍵字

GPR ； Rough rice ； Moisture content ； Radar velocity