摘要
通过对2010年2、3月佳木斯国家基准气候观测站人工观测与超声波雪深传感器测量获取数据对比、分析不同天气条件下(高风速、低风速、低温度)两种方法获得的数据差值的变化情况。结果表明:观测结果差异的大小主要受温度和风速两个因素的影响。低温环境下温度会影响超声波的行程时间使得超声波传感器的测量精度受到影响,通过温度补偿的方法对雪深进行订正可以提高超声波传感器的测量精度,两者的差值较小,且观测资料有较好的可比性;高风速时,风速会影响超声波脉冲,使其偏离传感器的下方,同时超声波的速度也会受到影响,从而影响测量结果,使得两者的差值较大。
An introduction is made to the principles and measuring method of the ultrasonic snow depth sensor.Based on the snow depth data observed by the two methods,ultrasonic sensor and manual observation in the Jiamusi national reference climatological station,comparison and analysis are made in different weather conditions（high wind velocity,low wind velocity,low temperature）.The results show that the differences are mainly influenced by wind velocity and temperature.At high wind velocity,the ultrasonic pulses are greatly affected by wind speed,leading to the departure of the ultrasonic pulses from the bottom of the ultrasonic sensor;meanwhile,the speed of ultrasound pulses is also affected,and thus,the measurement results are affected.The travel time of ultrasonic pulses is affected by the temperature,so when the temperature was extremely low,the performance of ultrasonic sensors is obviously affected.
出处
《气象科技》
2012年第2期198-202,共5页
Meteorological Science and Technology
关键词
超声波
人工观测
雪深
对比
ultrasonic sensor
manual observation
snow depth
comparison
作者简介
梁延伟，女，1982年生，硕士生，从事大气探测技术研究，Email：liangyanwei905@163．com
