Patent ID: 11927487
Assignee: ROSEMOUNT INC.
Field: Measurement (Instruments)
Classification: CPC G  H | IPC G  H

Claim 14:
15. A method in a wireless field device in an industrial process control system for monitoring an industrial process, comprising:
storing acoustic profile information comprising acoustic amplitude values at a plurality of frequencies in a memory;
sensing an ambient environment of the industrial process using an ambient environment sensor comprising an acoustic sensor which senses an acoustic signal received from the ambient environment operating in a low power pilot mode at a first sampling rate;
comparing acoustic amplitude values at a plurality of frequencies of an output from the ambient environment sensor to the acoustic amplitude values at the plurality of frequencies of the acoustic profile information stored in the memory;
detecting an anomaly in the sensor output signal based upon the comparing; and
causing the sensor to enter a high power mode in response to detection of the anomaly at a second sampling rate, wherein the first sampling rate is less than the second sampling rate.