The lack of availability of a single, complete paper on the
analysis of a digital data acquisition system for in situ oceanographic
measurements brought about the present work. In order to compile
an accurate technical paper on such a complex system, it was necessary
to design, construct, and calibrate a system for the in situ
measurement of various physical and chemical properties of sea
water.
A unique digital encoding circuit was developed which utilizes
the basic principles of null balance, resistance ratio bridge and
potentiometer measurements. The circuit is a uniquely loaded binary
ladder resistance network. Variation of the loading allows resistance
ratio and potentiometric measurements to be made over different
ranges with a constant high degree of resolution.
The developed system has the capability of measuring any
parameter which can be converted into a varying voltage, current,
or resistance. The range over which the measurement can be made
is adjustable; and the resolution equals ± 0.006% of the full range
value. The resolution is constant over the full range, as a result of
the analog-to- digital converter linearity characteristics. / Graduation date: 1968
| Identifer | oai:union.ndltd.org:ORGSU/oai:ir.library.oregonstate.edu:1957/28255 |
| Date | 14 March 1968 |
| Creators | Albin, Arthur Grayson |
| Contributors | Neshyba, Stephen J., Freund, Harry |
| Source Sets | Oregon State University |
| Language | en_US |
| Detected Language | English |
| Type | Thesis/Dissertation |
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