Sensor, sensor system, and method for remotely sensing a variable
First Claim
1. A sensor for remote detection of a measurable variable, having a first resonator (5), which has a resonant frequency that is variable under the influence of the measurable variable, having an antenna (1) for sending and receiving a modulated high-frequency signal and a modulator (2) for coupling the first resonator (5) to the antenna (1), characterized in that it includes a second resonator (3), which is excitable by a carrier frequency of the modulated high-frequency signal.
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Accused Products
Abstract
A sensor system for remote detection of a measurable variable includes a sensor, with a first resonator (5) which has a resonant frequency that is variable under the influence of the measurable variable; an antenna (1) for sending and receiving a modulated high-frequency signal; a modem (2) for coupling the first resonator (5) to the antenna; and a second resonator (3) that can be excited by a carrier frequency of the high-frequency signal. An interrogation unit generates an inquiry radio signal for exciting the two resonators and interrupts the broadcasting of the inquiry radio signal in order to receive a response radio signal broadcast by the sensor.
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Citations
16 Claims
- 1. A sensor for remote detection of a measurable variable, having a first resonator (5), which has a resonant frequency that is variable under the influence of the measurable variable, having an antenna (1) for sending and receiving a modulated high-frequency signal and a modulator (2) for coupling the first resonator (5) to the antenna (1), characterized in that it includes a second resonator (3), which is excitable by a carrier frequency of the modulated high-frequency signal.
Specification