Flexible combination type electric capacitance tomography data obtaining system for sensor electrode

Abstract

The invention provides a flexible combination type electric capacitance tomography data obtaining system for a sensor electrode. The flexible combination type electric capacitance tomography data obtaining system consists of a hardware system and control software; the hardware system comprises six parts, namely a capacitance sensor, a microcontroller, a combination array switch, an excitation source, a capacitance-to-voltage and digital-to-analogue conversion circuit and an upper computer; the excitation source is used for generating a sinusoidal signal with a high precision; the combination array switch receives a control instruction sent by the microcontroller so as to realize flexible combination of working modes of the sensor electrode; the capacitance-to-voltage and digital-to-analogue conversion circuit realizes conversion between a capacitance value and a voltage value of a sensor, data conditioning, and conversion between an analogue signal and a digital signal; and the control software is mounted on the upper computer, sets the data obtaining system by controlling a software interface, and sends information to the microcontroller. The flexible combination type electric capacitance tomography data obtaining system is matched with the control software by adopting a modularized design, and carries out modularized assembly according to actual working demands, so that the random flexible combination of the excitation source and a measurement polar plate is realized; and the environment adaptive capacity, the generality and the measurement precision of the data obtaining system are improved, and the cost is saved.

Description

technical field [0001] The invention belongs to the technical field of electrical capacitance tomography, and in particular relates to an electrical capacitance tomography data acquisition system with flexible excitation and combined detection. Background technique [0002] Electrical Capacitance Tomography (abbreviated as ECT) is a new type of multiphase flow parameter detection technology, which has the advantages of low cost, fast speed, non-invasiveness, wide application range and good safety, and is widely used in Real-time on-line measurement of multiphase flow fluid distribution in economic industries such as petroleum, environmental protection, metallurgy, and chemical industry, so as to realize the monitoring and optimization of the production process. [0003] In the field of capacitance tomography system, patent 01112515.2 "capacitance tomography capacitance measurement system" and patent 01120206.8 "a square capacitance tomography sensor" discussed the shape of t...

AI Technical Summary

Problems solved by technology

Due to the fixed working mode and the fixed number of capacitive sensor plates of the traditional ECT data acquisition system, it is impossible to randomly adjust the working mode and the number of capacitive sensor plates according to the actual working environment. Sex is not strong

[0007] (2) Due to the poor versatility of the traditional ECT data acquisition system, in actual work, the system can only exist in a similar customized manner, which is not conducive to cost saving

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