Inductive sensor for measuring the speed or the direction of rotation of a shaft
The inductive sensor has 2 or 3 coils (1,3,5) positioned in the effective range of a damping plate (31), attached to the shaft (30), each coil connected in circuit with a capacitor (2,4,6) for forming a measuring oscillator receiving resonance pulses (P1,P2,P3) of defined length. A Schmitt trigger (...
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Main Author | |
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Format | Patent |
Language | English French German |
Published |
21.05.1997
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Edition | 6 |
Subjects | |
Online Access | Get full text |
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Summary: | The inductive sensor has 2 or 3 coils (1,3,5) positioned in the effective range of a damping plate (31), attached to the shaft (30), each coil connected in circuit with a capacitor (2,4,6) for forming a measuring oscillator receiving resonance pulses (P1,P2,P3) of defined length. A Schmitt trigger (7,8,9) converts the sinusoidal oscillations into rectangular pulses fed to a counter (21,22), with a further counter indexed by measuring pulses (Pm) provided by a measuring oscillator (Om), to provide a reference threshold for the count values (Z1,Z2) fed to a decoder providing the shaft revs (n) and rotation direction (Ri). |
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Bibliography: | Application Number: EP19950103312 |