【摘要】 针对目前气象水文部门普遍采用的超声波蒸发传感器测量精度只有1.5mm且测量时易受环境因素影响的问题,提出了基于磁致伸缩位移测量技术,研制出一种高精度的测量装置,实现对水面蒸发量的自动测量,其测量精度可以达到0.1mm,同时给出了有关实现电路。通过在自动气象站中应用该装置进行为期6个月的蒸发量自动测量,并将自动测量数据和人工观测数据进行对比,验证了磁致伸缩技术在实现蒸发量的高精度自动化测量方面的可行性。在气象水文部门,可以使用该装置代替超声波蒸发传感器,得到精度更高、稳定性更好的蒸发量测量结果。更多还原

【Abstract】 In meteorological and hydrological services,the evaporation of water surface is measured by ultrasonic sensors,whose precision is only 1.5 mm and measurement is easily disturbed by environmental factors.In order to solve these problems,a new evaporation measurement unit based on magnetostriction technology whose precision is up to 0.1 mm is presented.The related schematic circuit is given.The unit is tested for 6 months in an automatic weather station.Through comparing the results of manual and automatic methods,the feasibility of the automatic evaporation measurement unit with this technology is verified.The results indicate that this unit can be used instead of ultrasonic sensors to achieve the goal of high precision and better stability in meteorological and hydrological services.更多还原