摘要
土壤温度高精度测量系统以热电偶为测温传感器,在单片机的控制下自动实现温度的高精度检测,以便分析土壤温度对其他土壤水热参数的影响。系统在采用高精度电桥法测温的基础上,用最小二乘法对采样值进行分段拟合,描绘出采样值与温度的关系曲线,并对测量误差进行修正和补偿,从而实现了土壤温度的高精度测量。
High accurate measurement system for soil temperature used thermocouple as temperature sensors and under the control of the microcontroller to achieve automatic high accurate measurement,to analyze the impact on the other soil water thermal parameters.On the basis of using high precision bridge method for temperature acquisitions,the system used the least squares method for segmented curve fitting and described the relationship of sampling value and temperature,to compensate and correct the measurement error,so as to realize the high accurate measurement for soil temperature.
出处
《农机化研究》
北大核心
2013年第8期158-161,共4页
Journal of Agricultural Mechanization Research
基金
河北省自然科学基金资助项目(D2010000795)
保定市科学技术研究与发展计划支持项目(12ZN020)
关键词
土壤温度
高精度
热电偶
分段拟合
soil temperature
precise accurate
thermocouple
segmented curve fitting
