Moisture-proof Technique of Equipment at the Five-Finger Mountain Deformation Station
The humid environment inside the cave at the Five-Finger Mountain deformation station in Hainan has a significant impact on instruments,which caused different degrees of damage to sensors,calibration systems,and data transmission lines.The aforementioned environment could result in frequent equipment failure,which affects the quality and continuity of observation data.In this study,moisture-proof technique was applied to the equipment inside and outside the cave at the Five-Finger Mountain deformation station.Based on the performance and working principle of the instruments,moisture-proof and temperature or pressure control tests were conducted on various key components of the equipment(e.g.the pier,probe,connection parts,and mainframe),which effectively reduced the impact of external factors on the instruments and improved data uptime and efficiency.After the moisture-proof treatment,the background noise of the instruments also decreased significantly.The average noise level of the water pipe inclinometer decreased from 0.233 to 0.147 after the treatment.Increasing the density of the moisture-proof boxes is helpful for reducing the humidity inside the cave.Placing 25 moisture-proof boxes on the piers of three sets of equipment recorded a decrease in humidity from 97%RH to 92%RH,whereas placing 100 moisture-proof boxes on the piers of three sets of equipment recorded a decrease in humidity to below 80%RH.
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