| 摘要 |
FIELD: measurement technology, measurement methods ensuring investigation of distribution of pressure over surfaces of models of aircraft. SUBSTANCE: readings of semiconductor pressure pickups integrated in thermally stabilized modules are recorded under conditions of change of temperature of environment surrounding modules. Thermally stabilized modules are calibrated at ambient temperature before and after test/investigations. Pressure values in points are established by readings of pickups with use of results of calibrations of values of pressure. In addition temperature of environment surrounding thermally stabilized modules is taken during tests/investigations and calibrations. Calibrations are also conducted in several points in wide range of working temperatures, this range is simultaneously divided into several sections per each individual module with limitation of their extent by value of permissible error of pressure measurement. Functions of inverted transfer corresponding to temperature sections per each individual pressure pickup are found by results of calibrations. Sections are corrected and/or operative test of pickups are conducted. Operation of selection of section corresponding to temperature outside of module is carried out, values of pressure are computed by readings of pickup with the help of function of inverted transfer corresponding to selected section. EFFECT: diminished temperature errors in the process of multiple-point measurement of pressures. 3 dwg |
