HMP45D湿度传感器温度特性测试与分析

HMP45D型温湿一体化传感器,在我国气象部门被广泛用于测量空气湿度。由于我国地域辽阔,南方和北方气象台站环境温度差异较大,尤其是在寒冷的冬季,地处北部地区的台站,环境温度可达-40℃以下。为掌握环境温度的变化对湿度测量准确度的影响,本次试验随机选取3支HMP45D湿度传感器作为被测件,利用双压法湿度发生器发生的湿度值作为标准值,在不同温度点上,对3支湿度传感器进行了测量准确度的温度影响量测试。

Test and Analysis of Temperature Characteristics for HMP45D Humidity Sensors

The HMP45D humidity sensor,an integrated temperature and humidity measuring device,is used widely across China.Because of the vast territory of China,there exists big difference in the environment temperature from south to north,especially in cold seasons.At some stations in the furthest North,temperature can be as low as-40 ℃.In order to understand the influence of environment temperature on the measuring accuracy of humidity,a characteristic experiment was conducted.Three humidity sensors were randomly selected as testing sensors and the output humidity values of the double-pressure humidity generator were used as standard humidity values.Under the different temperature conditions,the testing of the influence degree of temperature on the measuring accuracy of humidity was carried out.