Back to results
US 4,056,001 AGranted
Air flow measurement
OwnerJack Arakelianinventor
Life of this patent
Estimating the term…
Abstract
Quadrature positioned magnetic diaphragms are exposed to air flow which cause them to flex. Variations in reluctance of magnetic paths including these diaphragms are sensed electrically and the resulting signals processed to provide speed and direction readings.
Claims30
In a system for detecting and measuring the direction, or velocity, or both of gaseous currents subject to unpredictable variations, comprising:
- a sensing head to be subjected to the currents, the sensing head including a pair of substantially planar surfaces positioned at an angle to one another, and adapted to be impinged by the currents,
- each surface being of magnetic material, and each surface being subject to transverse displacement in response to impingement by the currents,
- a pair of magnetic circuit means respectively in circuit with the different surfaces, each circuit having a reluctance which varies as a function of the transverse displacement of its associated surface,
- means for electrically exciting each magnetic circuit means,
- means for deriving from each magnetic circuit-means an electric signal corresponding to the excitation as modified by the variations in reluctance, and
- means for processing the derived signals to produce an indication of the gaseous currents.
3 more elements
Dependencies are inferred from the claim text.