FIELD: machine building.
SUBSTANCE: control over ball motion is effected thanks to the fact that there is difference in gas static pressure ahead of and behind the ball moving in gas flow. Orifices in diameter not exceeding 1/3 of ball diameter are made in tube wall. Gas pressure is transmitted via thin tubes to sensitive differential diaphragm pressure gage. Origination of dynamic signal testifies about ball position in tube length between gas bleed orifices. Proposed method consists in that said ball is registered by short negative pulse of differential pressure developing in the ball "gas shadow", that is immediately behind the ball, right at approach to the first gas bleed point.
EFFECT: control over ball motion in whatever conditions.
3 cl, 2 dwg
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