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US 12,255,643 B2Granted
Proximity switch and method for detecting an object to be sensed
AssigneeTurck Holding GmbH
InventorsAlexander Magnus Makkinga, Oliver Marks, Michael Faber
Life of this patent
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Abstract
The present disclosure provides a proximity switch. The proximity switch includes an oscillating circuit. The oscillating circuit is configured to detect an object to be sensed. The oscillating circuit has a resonant frequency, and the resonant frequency is in a range of from 0.8 MHz to 20 MHz. The present disclosure further provides a method for detecting an object to be sensed.
Claims19
A proximity switch comprising:
- an oscillating circuit configured to detect carbon based on a change in amplitude of a detection signal,
- wherein the oscillating circuit has a resonant frequency in a range of from 0.8 MHz to 20 MHz,
- wherein the oscillating circuit comprises a first pair of coils, a second pair of coils, and a capacitor,
- wherein the first pair of coils includes a first transmitting coil and a first receiving coil, and
- wherein the second pair of coils includes a second transmitting coil and a second receiving coil.
2 more elements
A method for detecting carbon with a proximity switch, the method comprising:
- providing an oscillating circuit in the proximity switch, the oscillating circuit comprising a first pair of coils, a second pair of coils, and a capacitor, wherein the first pair of coils includes a first transmitting coil and a first receiving coil and the second pair of coils includes a second transmitting coil and a second receiving coil;
- emitting, by the proximity switch, a detection signal at a frequency in a range of from 0.8 MHz to 20 MHz, and
- detecting carbon using the oscillating circuit based on a change in amplitude of the detection signal.
A proximity switch comprising:
- an oscillating circuit configured to detect carbon based on a change in amplitude of a detection signal, the oscillating circuit comprising a first pair of coils and a second pair of coils, the first pair of coils including a first transmitting coil and a first receiving coil, and the second pair of coils including a second transmitting coil and a second receiving coil;
- and
- an amplifier configured to amplify a received signal received by the oscillating circuit,
- wherein the oscillating circuit has a resonant frequency in a range of from 0.8 MHz to 20 MHz, and
- wherein the amplifier has at least one filter stage and at least one capacitive element matched to the resonant frequency of the oscillating circuit.
2 more elements
Dependencies are inferred from the claim text.