Development of an Expendable Particle Sensor
Progress rept. Apr-Jul 1992
SEA TECH INC CORVALLIS OR
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This report addresses progress on the Phase II Development of the Expendable Particle Sensor EPS over the time period of April through July 1992. Significant technical progress has been made during this time related to the study and measurement of the XOTD transmission line characteristics. The results of the study and measurement allowed Sea Tech to design the telemetry system line receiver to interface with the Sparton transmission line. The new telemetry system was then tested in both the laboratory and the field with excellent results. Determining the characteristics of the two wire transmission line for both air and water consumed a significant amount of time during this period. An understanding of transmission line characteristics is essential if the transmission line receiver is to be designed with optimum performance. The resistance, inductance and capacitance are the fundamental electrical characteristics of the transmission line. The resistance of the wire is given by the manufacturer. The transmission line inductance has no effect because a differential source is used to drive the transmission line, and therefore it is ignored. The capacitance of the transmission wire is not given by the manufacturer, so it was necessary to calculate and measure the bifilar wire capacitance for both air and water environments.
- Magnetic and Electric Field Detection and Detectors