Design of instantaneous liquid film thickness measurement system for conductive or non-conductive fluid with high viscosity
Source abstract
Abstract
In the paper, a new capacitive sensor with a dielectric film coating was designed to measure the thickness of the liquid film on a flat surface. The measured medium can be conductive or non-conductive fluid with high viscosity such as silicone oil, syrup, CMC solution and melt. With the dielectric film coating, the defects caused by the humidity in a capacitor can be avoided completely. With a excitation frequency 0-20kHz, the static permittivity of capacitive sensor is obtained and stable when small thicknesses are monitored within the frequency of 0-3kHz. Based on the measurement principle, an experimental system was designed and verified including calibration and actual measurement for different liquid film thickness. Experimental results showed that the sensitivity, the resolution, repeatability and linear range of the capacitive sensor are satisfied to the liquid film thickness measurement. Finally, the capacitive measuring system was successfully applied to the water, silicone oil and syrup film thickness measurement.
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Research context
OpenAlex topics: Sensor Technology and Measurement Systems · Analytical Chemistry and Sensors · Electrical and Bioimpedance Tomography
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
School of Computer Science and Technology, Tianjin University 1 , Tianjin 300072, China
State Key Laboratory of Precision Measurement Technology and Instruments, Tianjin University 2 , Tianjin 300072, China
Tianfa Science and Technology LTD of Tianjin University 3 , Tianjin 300072, China
School of Mechanical Engineering, University of Jinan 4 , Jinan 250022, China
References (25)
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