| 摘要 |
A non-contact position sensor comprises a first reactive element for accepting radio frequency (RF) energy from an oscillator and radiating said RF energy to generate an excitation flux. A second reactive element intercepts the excitation flux and an RF voltage is induced therein. An RF voltage detector, operatively coupled to the second reactive element, detects the RF voltage induced in the second reactive element to generate an output voltage. A third reactive element is capable of intercepting the excitation flux to generate a back electromagnetic force (EMF) in the second reactive element such that, upon the third reactive element being displaced relative to at least one of the first and second reactive elements, the RF voltage detector generates a position-dependent output signal indicative of the displacement of the third reactive element.
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