6050X1型时域反射仪的测定原理与灵敏性

The Measuring Principle and the Sensitivity of 6050X1 Time Domain Reflectometry

介绍了６０５０Ｘ１型时域反射仪（ＴＤＲ）的基本结构和测定土壤含水率的原理，通过试验分析了它对导棒材料性质及导棒长度的灵敏性。结果表明，用铜和不锈钢做波导棒效果基本一致，导棒实际长度与输入长度的微小偏差对含水率的测量结果影响很小。

This paper introduced a principle for measuring soil and water content with 6050X1 Time Domain Reflectometry and its constitution.Based on field experiments and theoretical analysis,the sensitivity of TDR to the nature of wave guide materials and to the length of wave guide was studied.The results showed that to measure the soil and water content with copper wave guides had the same effect as with wave guides made from stainless steel,that the small difference between real wave guide length and inputted length exercised slight influence on soil and water content measurement and that the longer the wave guide the slighter the influence was.