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http://bura.brunel.ac.uk/handle/2438/1793
Title: | Design of sensor electronics for electrical capacitance tomography |
Authors: | Huang, SM Xie, CG Thorn, R Snowden, D Beck, MS |
Keywords: | Computerised tomography; Electric impedance imaging; Electric sensing devices; Image sensors |
Issue Date: | 1992 |
Publisher: | IEE Proceedings G |
Citation: | IEE Proceedings G, 139(1): 89 - 98, Feb 1992 |
Abstract: | The design of the sensor electronics for a tomographic imaging system based on electrical capacitance sensors is described. The performance of the sensor electronics is crucial to the performance of the imaging system. The problems associated with such a measurement process are discussed and solutions to these are described. Test results show that the present design has a resolution of 0.3 femtofarad. (For a 12-electrode system imaging an oil/gas flow, this represents a 2% gas void fraction change at the centre of the pipe) with a low noise level of 0.08 fF (RMS value), a large dynamic range of 76 dB and a data acquisition speed of 6600 measurements per second. This enables sensors with up to 12 electrodes to be used in a system with a maximum imaging rate of 100 frames per second, and thus provides an improved image resolution over the earlier 8-electrode system and an adequate electrode area to give sufficient measurement sensitivity |
URI: | http://bura.brunel.ac.uk/handle/2438/1793 |
ISSN: | 0956-3768 |
Appears in Collections: | Business and Management Brunel Business School Research Papers |
Files in This Item:
File | Description | Size | Format | |
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00125121.pdf | 546.02 kB | Adobe PDF | View/Open |
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