摘要
研究温度和风速对湿度传感器动态特性的影响。利用湿度传感器动态特性校准装置在不同的温度和风速条件下对湿度传感器的动态特性进行了测试,分别运用图解法、湿度变化法和非线性最小二乘法计算了湿度传感器在不同温度和风速条件下的阶跃响应的时间常数。计算结果表明:在15～30℃温度范围内,随着温度的升高,湿度传感器时间常数变小;在0～4m/s风速范围内,随着风速的变大,其时间常数变小。在进行湿度传感器的动态特性评价时必须考虑温度和风速的影响。
The influence of temperature and wind velocity on the dynamic characteristics of humidity sensors is studied by testing the dynamic characteristics under different temperatures and wind velocities according to the dynamic characteristics of humidity sensor calibration device. The time constants of a humidity sensor under different temperatures and wind velocities are calculated by using the graphic method, humidity changing method, and damp least square method, respectively. The results indicates that within the temperature range of 15 ℃ to 30 ℃, the time constants decrease with the rising temperature, and within the wind velocity range of 0 to 4 m/s, the time constants decrease with the increasing wind velocity. It is concluded that temperatures and wind velocities must be taken into account when evaluating dynamic characteristics of humidity sensor.
出处
《气象科技》
2012年第6期910-913,共4页
Meteorological Science and Technology
关键词
湿度传感器
动态特性
阶跃响应
时间常数
humidity sensor, dynamic characteristic, step response, time constant
