FIELD: measurement equipment.
SUBSTANCE: device includes contact-free rotary sensor, square-wave forming units, arranged hatched reflector areas at outer blade ends, optical electronic converter, emission source, light sensor, microcontroller, personal computer displaying data of spin-up angle and/or rotary oscillation component amplitude in user-friendly form by data processing software installed on PC.
EFFECT: reduced labour capacity of measurement and increased accuracy.
2 cl, 3 dwg
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