Method of determining the difference between the transit times o

Details Method of determining the difference between the transit times o Method of determining the difference between the transit times o

1983-04-26

1986-02-11

Roskoski, Bernard

Horology: time measuring systems or devices

Time interval

Electrical or electromechanical

356 5, 343 12R, G01C 308

Patent

active

045695997

ABSTRACT:
The invention provides a method and an apparatus for determining the difference between the transit times of measuring pulse signals from a transmitter to a receiver along a measuring signal path establishing an unknown time of travel which is representative for a physical quantity of interest, and the transit times of reference pulse signals generated by the same transmitter and forwarded to the same receiver along a reference signal path establishing a known, constant time of travel, whereby for the measurement of each of said transit times the time distance between a trigger signal triggering the generation of the respective measuring pulse or reference pulse signal and a time-significant signal is measured which is generated in a defined time relation to the instant at which the respective pulse signal is received by said receiver. Both average values comprise non-linearity errors to the same extent so that these errors are eliminated when the second one of these average values is subtracted from the first one.

REFERENCES:
patent: 3728025 (1973-04-01), Madigan et al.
patent: 4139301 (1979-02-01), Chaborski
patent: 4181431 (1980-01-01), Chaborski

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