【摘要】 提出了将近红外传感与AVR单片机控制技术相结合来测量土壤含水量的设计方法。该方法具有非接触式、功耗小、便携、速度快等特点。更多还原

【Abstract】 A soil moisture measurement design method was put forward based on near-infrared sensors and AVR. According to the principle of different soil moisture absorbing different light, the system controlled optical modulation with AVR. Light emit to the measured soil through transmission of three probe optical fiber sensor beam. The reflected light input AVR after photoelectric conversion, amplification. AVR gained soil moisture after A/D conversion. The system had the characteristics of non-contact measurement, low energy, portability, fast response and so on.更多还原