PRESSURE BASED WIRELESS SENSOR AND APPLICATIONS THEREOF

摘要

A wireless sensor includes an antenna, a tuning circuit, a pressure sensing circuit, a processing module, and a transmitter. Collectively, the pressure sensing circuit, the antenna, and the tuning circuit have one or more radio frequency (RF) characteristics and the pressure sensing circuit causes the RF characteristic(s) to vary with varying sensed pressures. The processing module detects a variance of the RF characteristic(s) from a desired value. In response to the detecting of the variance, the processing module adjusts the tuning circuit to substantially re-establish the desired value of the RF characteristic(s). The processing module generates a message regarding the adjusting of the tuning circuit, wherein a level of the adjusting is representative of a variance of pressure sensed by the pressure sensing circuit. The transmitter transmits the message.

主权项

1. A wireless sensor comprises:
an antenna; a tuning circuit operably coupled to the antenna; a pressure sensing circuit operably coupled at least one of the antenna and the tuning circuit, wherein the antenna, the tuning circuit, and the pressure sensing circuit collective have one or more radio frequency (RF) characteristics and wherein the pressure sensing circuit causes the one or more RF characteristics to vary with varying sensed pressures; a processing module operable to:
detect a variance of the one or more RF characteristics from a desired value of the one or more RF characteristics;in response to the detecting of the variance, adjust the tuning circuit to substantially re-establish the desired value of the one or more RF characteristics; andgenerate a message regarding the adjusting of the tuning circuit, wherein a level of the adjusting of the tuning circuit is representative of a variance of pressure sensed by the pressure sensing circuit; and a transmitter operably coupled to transmit the message.