Wheel sensor
AssigneeSiemens Aktiengesellschaft
InventorRainer Freise
Life of this patent
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Abstract
A wheel sensor that is particularly suited for track release signaling systems has at least one sensor device having an AC-fed sensor coil of an electric oscillating circuit sensitive to an inductive interaction of the sensor coil with passing wheels of rail vehicles. A further spool is connected to the sensor coil for suppressing external interference fields in a counter circuit. The further coil is arranged underneath the sensor coil and a spacing distance between the further coil and the sensor coil is at least one third of the inside diameter of the sensor coil.
Claims11
1-7. (canceled)
A wheel sensor with at least one sensor device, comprising:
- a sensor coil, operating on alternating current, connected in an electrical resonant circuit that is sensitive to an inductive interaction between said sensor coil and a rail vehicle wheel rolling past said sensor coil, said sensor coil having an internal diameter;
- and
- a further coil disposed underneath said sensor coil, connected in an opposite sense to said sensor coil, and operative to suppress external interference fields;
- said further coil being disposed at a spacing distance from said sensor coil, said spacing distance amounting to at least one third of said internal diameter of said sensor coil.
Dependencies are inferred from the claim text.