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- W2045372226 abstract "ABSTRACT A laser-based trigger for remotely actuating vehicle-mounted instrumentation was developed and evaluated for accuracy and precision in measuring vehicle travel time through a course of designated length. Parallel start and end lines were established by aligning two laser beams. A laser beam detector mounted on the vehicle consisted of a linear array of photodiodes plus appropriate optical filters. When the first beam was detected as the vehicle was driven along a path perpendicular to the beams, a counter circuit in an on-board computer was automatically activated. Counting continued until the second beam was encountered. The sum of the counts from the 1-MHz clock were subsequently read to indicate travel time. Field tests were conducted to compare time measurements obtained with the automatic system with those obtained manually by the vehicle operator and by multiple spotters on the ground. Regression analyses indicated that there were no systematic errors in the laser-based system. Further, variation about the line when laser measurements were regressed on measurements by the ground spotters was typically less than half that observed when values recorded by any manual spotter were similarly considered." @default.
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- W2045372226 date "1990-01-01" @default.
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- W2045372226 title "LASER-BASED TRIGGER FOR REMOTE ACTUATION OF VEHICLE-MOUNTED INSTRUMENTATION" @default.
- W2045372226 doi "https://doi.org/10.13031/2013.31543" @default.
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