A theoretical and experimental investigation of accelerometer design using thick-film technology
Sion, Russell Paul (1993) A theoretical and experimental investigation of accelerometer design using thick-film technology. University of Southampton, School of Engineering Sciences, Doctoral Thesis .
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This thesis describes research undertaken to develop a low-cost accelerometer using thick-film strain gauge transduction elements. A systematic design process was adopted, including a study of substrate materials, evaluation of the fatigue life of the transducer, investigations of the mechanical and thermal properties of thick-film inks, and an assessment of the limits on resolution imposed by the intrinsic noise characteristics of thick-film resistors.
The research has shown that fatigue is unlikely to be a problem for thick-film transducers and has led to a new explanation of the nature of thermally-induced resistance changes observed in thick-film resistors. It has also been shown that since the thick-film resistor noise exhibits a 1/f characteristic the resolution of the transducer is frequency dependant.
The accelerometer design adopted uses thick-film strain gauges in a novel 'z-axis' configuration, which confers a number of advantages on the design. Firstly, the thick-film transducers are kept in a state of compressive stress, which is varied by the acceleration in a manner which allows the strain gauges to only experience tensile stress. This makes the design very rugged, and allows the use of ceramic substrates. Secondly, the use of the z-axis technique gives a higher gauge factor than all other methods, thus enhancing the sensitivity of the sensor and simplifying the signal conditioning required.
|Item Type:||Thesis (Doctoral)|
|Subjects:||T Technology > TA Engineering (General). Civil engineering (General)|
|Divisions:||University Structure - Pre August 2011 > School of Engineering Sciences
|Date Deposited:||07 Aug 2007|
|Last Modified:||02 Mar 2012 11:48|
|RDF:||RDF+N-Triples, RDF+N3, RDF+XML, Browse.|
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