Harvey, William Jack P. (1984) Theory and design of a precision dual system to measure time intervals in nanoseconds and automatically synchronize from two to four external systems. Masters thesis, Memorial University of Newfoundland.
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Verniers are employed widely in determining precise spatial measurements. A new time measuring system has been created, which may be revolutionary in nature, since it employs digital electronics and does not concern itself with coincident edges as do contemporary systems. The system may be the first of its kind, being a true digital vernier system, which is capable of: -- 1. determining the time delay inherent in a device or a transducer. -- 2. producing time delays precise to a nanosecond. -- 3. balancing the time delays of associated devices. -- An analysis was made of the phase variations between the respective edges of the square pulses of two wave trains of different frequencies to determine if the principle of vernier measurement could be applied to create such an electronic system. -- This led to the design of the device described herein, consisting of four parallel modules each capable of operating individually in either an automatic mode A, or a semi-automatic mode B. For mode A, time intervals between two external stimuli are automatically determined to a precision of one nanosecond by a module, while for mode B, required time delays are inserted at the operator's discretion. As soon as the time intervals have been established, in either mode, the system then inserts the proper balancing time delays and initiates the four modules so that they produce properly timed pulses to external equipment according to a predetermined time sequence. Once set, the system is capable of automatic repetition. -- The system has been designated as the Precise Time Interval System11 (PTIS).
|Item Type:||Thesis (Masters)|
|Additional Information:||Bibliography : leaves 168-169|
|Department(s):||Science, Faculty of > Physics and Physical Oceanography|
|Library of Congress Subject Heading:||Precise Time Interval System;Verniers; Time measurements|
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