Patent ID: 9653926
Date: 2017-05-16
CPC Classifications: A61B,G01K,G01L,H02J

Claim:
1. A wireless sensor, comprising: a power harvesting unit configured to receive an external energizing magnetic field generated by an external interrogator and store the energy generated thereby; a transducing A-to-D converter unit comprising a passive electrical transducer configured to respond to variations in a physical property and a converter configured to measure a characteristic value of the passive electrical transducer and provide a digital signal that is indicative of the measured characteristic value; a microcontroller unit electrically coupled to the power harvesting unit and the transducing A-to-D converter unit, wherein the microcontroller unit is configured to receive the digital signal from the transducing A-to-D converter unit; and a transmitting coil configured to receive the digital signal from the microcontroller unit and transmit the digital signal to the external interrogator; wherein, upon receiving a start signal, the transducing A-to-D converter unit charges a current through the passive electrical transducer until a reference voltage is reached and, upon reaching the reference voltage, the microcontroller unit receives the digital signal.