Patent ID: 7692358
Filing Date: 2010-04-06
Classification: G01D,G01L,G01P

Abstract:
1. A micro mechanical backscatter sensor comprising: a receiver configured to receive a modulated electromagnetic signal; a capacitive element operatively connected to the receiver, the capacitive element being arranged such that a voltage is generated across the capacitor in response to the frequency of the received signal; a resonator operatively connected to the capacitive element such that electrostatic forces that are induced by the voltage generated cause the resonator to vibrate, the resonator vibrating at a resonance frequency of vibration thereof, the resonator being configured such that an external force applied thereto alters the resonance frequency of vibration thereof; a demodulator configured to demodulate the received modulated signal; a modulator configured to modulate a carrier signal of the received signal by mixing the carrier signal with the resonance frequency of the resonator to produce a modulated electromagnetic transmission signal; and a transmitter operatively connected to the capacitive element and configured to transmit the modulated transmission signal.