On-line measurement of random waveforms : with particular reference to natural change transport in n-hexane
Buffam, C. J. (1976). On-line measurement of random waveforms : with particular reference to natural change transport in n-hexane. (Unpublished Doctoral thesis, The City University)
Abstract
The descriptions of the author's studies in this Thesis relate to the design and realization of a new instrument and its application to some specific measurements on the behaviour of natural particles in the dielectric liquid n-hexane.
Connection of a Biomation 8100 transient recorder to an on-line laboratory computer has provided a solution to the problems associated with capturing, storing and processing large numbers of waveforms of random origin. The novel application of a waveform recognition
system has meant that the captured transients can be sorted into groups defined by the presence or absence of declared features in the waveshape.
The instrument formed by the union of the transient recorder and the computer has enabled a unique series of measurements to be undertaken. Confirmation of the findings of earlier workers relating to the potential of a natural impurity particle in the dielectric liquid came from the present author's initial measurements. In later experiments the motion of natural particles was monitored with the aid of a photomultiplier, and the first completely objective proof that natural particles in the liquid individually transferred charges in the order of a few femto Coulombs was established. Subsequently, measurements were carried out on the apparent dwell time of particles at an electrode.
An off-line study of the large pico Coulomb charge pulses has been performed and results are reported.
The on-line transient recorder has proved effective in solving measurement problems arising in other fields where randomly occurring events need to be captured and processed. The measurements pertaining to the propagation of cracks in metal specimens is just one example of such measurements successfully performed.
| Publication Type: | Thesis (Doctoral) |
|---|---|
| Subjects: | T Technology > TA Engineering (General). Civil engineering (General) T Technology > TK Electrical engineering. Electronics Nuclear engineering |
| Departments: | School of Science & Technology > Department of Engineering School of Science & Technology > School of Science & Technology Doctoral Theses Doctoral Theses |
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