| 1. | Using domestic strained integrated resistor as weighing sensor , at89c52 single chip as control unit , combined with arithmetical magnification , analogtodigital conversion ( a / d ) , real time clock , liquid crystal display ( lcd ) , and series communication interface , a minitype automatic weighing lysimeter is developed . that made measurement of evapotranspiration become conveniently and effectively in studying on water use of crops
为了方便、有效地测定植物的蒸散，为水分利用研究提供价廉物美、简单易用的仪器，本研究利用国产的集成电阻应变式称重传感器，采用at89c52单片机作为控制单元，结合运算放大、模数转换、实时时钟、液晶显示、数据存储、串行通信等外围接口电路，研制了小型自动称重式蒸散仪。 |
