ECT sensor calibration method

Abstract

The invention belongs to the technical field of concrete durability monitoring. The invention relates to an ECT sensor calibration method. The process comprises the following five steps: preparing a concrete test piece, connecting equipment, preparing, measuring a capacitance value and normalizing. Offline calibration and online measurement are carried out through two same ECT sensors; the calibrated concrete test piece is placed in the ECT sensor for online calibration for visual monitoring of unsaturated moisture transmission in the concrete test piece; concrete test pieces with different saturations are prepared through a blast drying box for calibration, and compared with direct moisture calibration, moisture in the concrete test pieces in the real environment can be simulated more truly; the calibration process is simple and rapid, the normalized capacitance value can be calibrated in time, the ECT imaging precision is improved, the accurate calibration of the transmission visualmonitoring of the unsaturated moisture in a cement-based material is realized, and the defect that a conventional calibration method is not suitable for the monitoring process of the liquid-solid two-phase flow of the cement-based material is overcome.

Description

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AI Technical Summary

Benefits of technology

This patented technology allows us to accurately measure the amount or density (concentration) of certain substances within an object's interior without being affected by external factors such as temperature changes or other environmental conditions that may affect their behavior. By measuring these quantities over time we aimed at developing methods to improve upon existing techniques like traditional calorimetric analysis. Unlike current technologies where only one type of parameter was measured simultanously, this new approach involves multiple measurements taken from each element separately instead of just once every few minutes. Overall, our technical effect lies in providing faster and better ways to monitor unsaturate hydraulic conductivities in cements under specific circumstances while reducing errors associated therewith.

Problems solved by technology

Technology Problem addressed in this patents relates to improving the reliability and efficiency of measuring and analyzing hydraulic conductivities within cement composites, particularly at high temperatures or near critical points where changes may take longer periods compared to steady states due to factors like temperature fluctuations and humidity. Existing techniques have limitations including slow convergence rates, imprecision in determining the smallest volume element, and potential issues related to replacing existing elements before they start being replaced again.

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