High-altitude capable wide velocity range flight velocity vector measurement probe and measurement system
US7480548B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Sep 13, 2005 |
| Grant date | Jan 20, 2009 |
| Priority date | — |
| Expiry date | Jan 4, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01P13/025
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
It is an object of the present invention to solve the problem of a drop in precision in conventional systems using a square pyramid type five-hole probe due to the drop in atmospheric pressure in high altitude ranges, and to provide a wide velocity range flight velocity vector measurement system that can prevent a drop in measurement precision. Furthermore, it is also an object of the present invention to provide a method for eliminating the effects of detection fluctuations caused by adhering water droplets, ice particles or dust in a wide velocity range flight velocity vector measurement system. The flight velocity vector measurement probe of the present invention comprises means in which a static pressure hole is formed in the tube wall surface of the probe, so that a static pressure value is obtained from the pressure detected by this static pressure hole, the Mach number M is calculated on the basis of an equation approximated by a fourth-order polynomial of the static pressure/total pressure signal and the angle of attack, and in cases where an abnormal detection value is detected, this is replaced by the preceding detection value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.