Observed Phenomenon in Grouting Duct Detection Progress using Capacitive Sensing Technique

摘要

Capacitive sensing technique was applied to detect multiphase-flow, grouting duct and many other fields. Some interesting phenomena were observed during the practical detection on grouting duct. The aim of this paper was to figure out these problems and provide guides for these issues. In this paper, 8 models of experiments were designed to determine the influence factors on the material of grouting duct, which caused the interesting phenomena. The experimental results show that three models, the water, steel bar-water, and steel bar-water-cement have influence of different degrees on the instability of measured results. The grounded wire of experimental specimens also could lead to the unstable measured values. Besides, the excessive angle of capacitive plates affect the measured results. The experimental results provide possible factors which caused the interesting phenomena and present the further research direction for the phenomena.