Return to search

The analysis and recommended design of a high-resolution digital data acquisition system for the in situ measurement of various physical and chemical parameters of sea water

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

Identiferoai:union.ndltd.org:ORGSU/oai:ir.library.oregonstate.edu:1957/28255
Date14 March 1968
CreatorsAlbin, Arthur Grayson
ContributorsNeshyba, Stephen J., Freund, Harry
Source SetsOregon State University
Languageen_US
Detected LanguageEnglish
TypeThesis/Dissertation

Page generated in 0.0017 seconds