应用于气象探测的双加热温度传感器设计∗

摘要

In order to compromise the measurement error caused by the deposition of water on the temperature sen-sors in high-altitude meteorological observation,a heated twin temperature sensor is proposed. The changes of the measurement error and time constant under different wind velocities and precipitation intensities are measured by al-ternately heating the two temperature sensing devices. By fitting the corresponding function,the error correction and precipitation intensity measurement are achieved. The test results show that under certain wind velocities and pre-cipitation intensities,this design can reduce the error caused by water evaporation from ±0.3 ℃ to below ±0.1 ℃. The precipitation intensity measurement error is ± 0. 2 mm/min. Compared with traditional radiosonde temperature sensors,the heated twin temperature sensor features high precision and has the capability of error elimination. The measurement of precipitation intensity is also realized in this design.%为消除高空气象探测等领域中温度传感器的沾水误差，提出了一种新颖的双加热温度传感器，利用温度测量元件交替加热测量的方法获得不同风速及降水强度条件下沾水误差与时间常数的变化。通过拟合对应的函数关系可实现沾水误差修正和降水强度测量功能。实验结果表明，在一定的风速及降水强度范围内，该传感器能使沾水引起的误差从±0.3℃降低至±0.1℃以下，降水强度测量误差低于±0.2 mm/min。与传统探空仪温度传感器相比，该双加热温度传感器不但精度高，具有消除沾水误差的能力，亦可初步实现降水强度的测量。