Patent ID: 8342027
Filing Date: 2013-01-01
Classification: G01N

Abstract:
1. A method for determining an unknown physical property of an object or fluid in a dynamic multi-path clutter environment, the method comprising: transmitting an RF interrogation signal to a wireless sensor physically coupled to the object or the fluid in the dynamic multi-path clutter environment wherein the transmitted RF interrogation signal generates multipath ringdown signals in the dynamic multi-path clutter environment; receiving a retransmitted reference signal and a retransmitted measurement signal from the wireless sensor, wherein the structure of the wireless sensor is such that, upon receipt of the RF interrogation signal, the wireless sensor produces a reference signal and a measurement signal and retransmits the reference signal and the measurement signal in the dynamic multi-path clutter environment, and wherein using a comparison of the retransmitted reference signal and the retransmitted measurement signal in the time domain to determine the unknown physical property of the object or fluid.