摘要
在利用超声波测量降雨量的自动雨量测量系统中,由于温度对超声波速度的影响,使测量的准确度降低,达不到设计要求,所以需要对它进行温度补偿。通过对测量过程中可能产生的误差进行了分析,提出了利用单线温度传感器DS1820测量雨水温度,实现对超声波传输速度的精确计算,达到准确测量雨量的设计要求(优于1%)。
Ultrasonic is used to measure rainfall in the automatic rainfall measuring system. The accuracy of measurement will reduce and the result will fall short of design requirements because the velocity of ultrasonic in water can be changed along with temperature, so temperature compensation must be used for the velocity. Inaccuracy in the process of measurement is analyzed.It is brought forward that temperature of rainfall is measured by the single-wire temperature sensor DS1820. So the velocity of the ultrasonic can be calculated accurately to fulfil design requirements of measuring rainfall.
出处
《传感器技术》
CSCD
北大核心
2004年第2期71-73,共3页
Journal of Transducer Technology
