怀来高精度洞温仪的研制和实测特征  

Development of High-precision Cave Thermometer and Actual Measurement Characteristics at Huailai Seismic Station

作　　者：池海江[1] 温佳 邢杰[2] 只楠 张晓刚[3] CHI Haijiang;WEN Jia;XING Jie;ZHI Nan;ZHANG Xiaogang(Huailai Seismic Station,Hebei Earthquake Agency,Zhangjiakou 075400,China;Zhangjiakou Seismic Station,Hebei Earthquake Agency,Zhangjiakou 075000,China;Hebei Earthquake Agency,Shijiazhuang 050021,China)

机构地区：[1]河北省地震局怀来地震台,河北张家口075400 [2]河北省地震局张家口地震台,河北张家口075000 [3]河北省地震局,石家庄050021

出　　处：《华北地震科学》2021年第2期73-79,共7页North China Earthquake Sciences

基　　金：河北省地震科技星火计划项目(DZ20190424073)。

摘　　要：为研究洞温的变化特征,设计研制了分辨率0.0001℃高精度洞温仪,在年变幅为0.06℃、日变幅为0.01℃(2019年统计)的怀来形变山洞中进行实测。通过对正常情况下洞温日曲线、月曲线、相关分析、周期、振幅谱分析发现,怀来洞温基本不受气温影响,和气压正相关,具有周期变化的潮汐效应;经分析造成洞温突变的主要因素有:人为进洞、标定电机转动,特别是降雨过程中的气压骤变引起洞温变化;“热胀冷缩”使洞温对洞体应变伸缩仪日变化干扰作用明显,2020年3月台站应变观测趋势性转折是由于洞温的微弱变化引起。建议今后观测时应利用现有洞室条件,布设高精度的温度观测仪,减少干扰,积累洞(地)温变化资料,更好地识别和发现地形变异常。In order to study the variation characteristics of cave temperature,a high-precision cave temperature instrument with a resolution of 0.0001℃was designed and developed.It was measured in Huailai deformation cave with annual variation of 0.06℃and daily variation of 0.01℃(Statistics in 2019).Through the analysis of the daily and monthly temperature curve,correlation analysis,period and amplitude spectrum under normal conditions,it is found that the temperature of Huailai cave is not affected by the air temperature,and is positively correlated with the air pressure,which has the tidal effect of periodic variation;the main factors causing the sudden change of the cave temperature are:man-made entering the cave,the rotation of the calibration motor,especially the sudden change of the air pressure in the process of rainfall,which causes the change of the cave temperature;"Heat expansion and cold contraction"makes the temperature of the cavity interfere obviously with the daily variation of the cavity's strain extensometer.The trend transition of the station strain observation in March 2020 is caused by the slight change in cave temperature.Future observations should utilize the existing cavern conditions,deploy high-precision temperature observations,reduce interference,and accumulate cave(ground)temperature change data to better identify and discover topographical abnormalities.

关 键 词：洞温 高精度 形变 实测 

分 类 号：P315.62[天文地球—地震学]