METHOD OF PNEUMATIC MEASUREMENT OF LINEAR DIMENSIONS Russian patent published in 2005 - IPC

FIELD: measurement technology.

SUBSTANCE: according to method, gas is supplied through entrance nozzles to measuring chamber of differential pneumatic measurement device and then through measuring nozzles to gap between surface of standard member and edge surfaces of measuring nozzles. Standard pressure inside measuring chamber is registered by means of sensing element and range of measurement is set. The standard member is replaced by member to be measured and deviation of pressure against standard pressure is registered. Results of measurement are represented in form of light scale. Results of measurement are sent from sensing element to pressure processing electronic unit. Whole range of measurements is divided to sub-ranges correspondingly to required precision of measurement. Electrical transmission ration is set for each sub-range. Minimal width of sub-range is put to lower limit of indication scale in measurement processing electronic unit. Maximal width of sub-range is put to upper limit of indication scale. Limits of measurement for each sub-range are tuned by means of corresponding standard members. Limits of measurements, electrical transmission ratios and results of measurements are stored in memorizing unit. Method allows to change range of measurement without changing measuring equipment.

EFFECT: increased precision of measurement.

4 cl, 1 dwg