Temperature effect on the reference frequency of FDR soil moisture sensor

• 作者: LYU Wenhua WANG Liming
• 来源期刊: 仪器仪表学报：英文版
• 学科: 农学
• 关键词: temperature effect FREQUENCY FDR SOIL MOISTURE SENSOR
• 年，卷（期）: 2015,（3）
• 页码范围: 19-26
• 页数: 8页
• 分类号: S152.7

摘要

The FDR automatic soil moisture sensor must determine reference frequency in the air and water. Experimental studies show that the water reference frequency is influenced by water temperature. The variation of the reference frequency of the sensor is measured with the change of the water temperature,then analysis the influence of the volume water content measurement of the sensor,analysis found that the error is not more than 3% for the measurement of the volumetric water content of the temperature.