Rotation detector, particularly for a volume measuring device.

摘要

The detector contains a rotor with angular division into several regions with different electromagnetic damping properties opposite sensors forming elements of an oscillator circuit. The oscillations are damped as the rotor turns. The oscillator output signal is fed to a discriminator circuit which measures the rotor rotations and can also measure its rotation direction. Two sensors can be used. A reference sensor (RS) is arranged opposite a region of the rotor with constant damping properties. The other sensor, i.e. the measurement sensor (MS), is arranged opposite an odd number of regions (d0-d2) of the rotor with different damping properties.