Proximity sensor and method for operating a proximity sensor
First Claim
1. A method of operating a proximity sensor that interacts with an initiator, the proximity sensor having a tuned circuit and a frequency generator, which comprises the steps of:
- determining a component from a complex system variable, the component being independent of a material of the initiator, and the complex system variable depends on a position and the material of the initiator, the determining step includes carrying out a determination of the component in a complex numerical plane by projecting the complex system variable onto a direction perpendicular to a straight line approximating a material dependence of the complex system variable.
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Accused Products
Abstract
A proximity sensor, in particular a proximity switch is described. A component that pertains to a system variable and is independent from the material of a trigger or target is elected and transformed into a non-periodic signal that depends upon the distance of the trigger. The trigger of a proximity sensor can thus be exchanged randomly without requiring subsequent adjustments. The impedance of an oscillation circuit which pertains to the proximity sensor, the impedance of an oscillation circuit coil, the amplitude of the oscillation circuit signal or a voltage divider ratio between the oscillation circuit and the additional resistance can be used s system variables for instance.
50 Citations
10 Claims
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1. A method of operating a proximity sensor that interacts with an initiator, the proximity sensor having a tuned circuit and a frequency generator, which comprises the steps of:
determining a component from a complex system variable, the component being independent of a material of the initiator, and the complex system variable depends on a position and the material of the initiator, the determining step includes carrying out a determination of the component in a complex numerical plane by projecting the complex system variable onto a direction perpendicular to a straight line approximating a material dependence of the complex system variable. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A proximity sensor for interacting with an initiator, comprising:
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a tuned circuit;
a frequency generator;
an evaluation circuit for determining a component, being independent of a material of the initiator, from a complex system variable being independent of the material and a position of the initiator, said evaluation circuit connected to said frequency generator and coupled to said tuned circuit; and
a device for projecting the complex system variable in a complex numerical plane onto a direction perpendicular to a straight line that approximates a material dependence of the complex system variable. - View Dependent Claims (9)
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10. A proximity sensor for interacting with an initiator, comprising:
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a tuned circuit;
a frequency generator;
an evaluation circuit for determining a component, being independent of a material of the initiator, from a complex system variable being independent of the material and a position of the initiator, said evaluation circuit connected to said frequency generator and coupled to said tuned circuit; and
means for projecting the complex system variable in a complex numerical plane onto a direction perpendicular to a straight line that approximates a material dependence of the complex system variable.
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Specification