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PCE
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CPC Subgroup
G01P 5/18

by measuring the time taken to traverse a fixed distance

Full Title

Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft (application of speed-measuring devices for measuring volume of fluid G01F) > by measuring the time taken to traverse a fixed distance

2 direct subcodes

Child Classifications

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  • G01P 5/20 using particles entrained by a fluid stream (G01P5/22 takes precedence)
  • G01P 5/22 using auto-correlation or cross-correlation detection means