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Reconfigurable smart sensors for dependable systems

Sharif, E. and Richardson, A. and Dorey, T. (1997) Reconfigurable smart sensors for dependable systems. In: Hardware Systems for Dependable Applications (Digest No: 1997/335), IEE Half-Day Colloquium on. IEEE, 2/1 -2/6.

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Abstract

The realisation of dependable systems requires improved reliability and confidence assessment of the data obtained from sensors within the system. This may be achieved at the system level by sensor validation techniques through the systematic analysis of redundant sensor data using analytic or spatial redundancy. In automotive applications where cost is a major factor, the use of redundant sub-systems needs to be avoided wherever possible, so some form of self validation becomes necessary. In this paper, an integrated diagnostic reconfiguration (IDR) approach is presented using the application example of an interface ASIC for a Wheatstone bridge pressure sensor. This approach provides improved reliability and confidence assessment within the smart sensor by the integration of fault tolerant reconfiguration and internal self validation. Capabilities and limitations of the approach are discussed along with an overview of the design methodology employed. An example of the use of IDR to detect and isolate a functional fault is included with a description of fault tolerance through the use of exclusion configurations

Item Type: Contribution in Book/Report/Proceedings
Uncontrolled Keywords: Wheatstone bridge pressure sensor ; dependable systems ; fault tolerant reconfiguration ; integrated diagnostic reconfiguration ; interface ASIC ; internal self validation ; reliability ; sensor validation ; smart sensors ; intelligent sensors
Subjects: UNSPECIFIED
Departments: Faculty of Science and Technology > Engineering
ID Code: 50464
Deposited By: ep_importer_pure
Deposited On: 25 Oct 2011 13:12
Refereed?: No
Published?: Published
Last Modified: 24 Jan 2014 06:00
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/50464

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