The Research Of Using Sectionalized Capacitance To Liquid Level Measurement

When separate oil from water at spilled oil recovery processing, the detection of oil-gas interface, oil-water interface and the oil thickness is a critical part, not only can detect oil-gas interface and oil-water interface, but also need to ensure the results in real-time and continuous, requires faster detection speed. This issue is research a such of measurement that real-time and dynamic detect multi-interface liquid level using micro-controller and capacitance measuring.By measuring the capacitance of sub-capacitor sensor then processing the measured data to get the interface position is the overall idea of this paper.This paper first introduces the various liquid level measurement methods, and then analysis the requirements mentioned in the subject and provides liquid level measurement needs, by comparing selected variety of measurement methods and selected measurement based on sub-capacitor sensor. Described the principle analyses of sub-capacitor sensor for liquid level measurement, implementation, and solution problems, go into detail about the design and production process of the liquid level measurement sensors from both hardware and software aspects, and finally is the experiment and analysis of the experiment and experimental data, thereby to verify the liquid level with sub-capacitor sensor in this topic is correct.This thesis covers two aspects:first is the principled analysis of the sub-capacitor liquid level detection and the analysis of the theoretical improvement basis it, thus simplifying the measurement process in theory, ensure the measurement speed. Secondary is specific circuit of the capacitance measurement realization, because in the measurement process, the capacitance is relatively small, interfered susceptible with variety of outside elements, so in order to meet the requirements of the subject, designing a measurement for small level of capacitance and resistant to outside interference. Through expand on this two aspects, completion the research of this paper form software and hardware.