Industrial process device utilizing piezoelectric transducer
AssigneeRosemount Inc.
InventorRobert C. Hedtke
Life of this patent
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Abstract
A process device for coupling to an industrial process for use in monitoring or controlling the process includes a device housing configured to physically couple to the industrial process. A process variable sensor is configured to measure a process variable and measurement circuitry coupled to the process variable sensor provides an output related to the sensed process variable. A piezoelectric transducer provides an electrical output related to pressure pulsations in the industrial process. Electrical circuitry in the housing includes an input configured to receive the electrical output from the piezoelectric sensor.
Claims34
A process device for coupling to an industrial process for use in monitoring or controlling the process, comprising:
- a device housing configured to physically couple to the industrial process;
- a process variable sensor configured to measure a process variable;
- measurement circuitry coupled to the process variable sensor having an output related to the sensed process variable;
- a piezoelectric transducer having an electrical output related to pressure pulsations in the industrial process;
- and
- electrical circuitry in the housing having an input configured to receive the electrical output from the piezoelectric sensor, the electrical output used to provide power to the process device.
A method for sensing pulsations in a process device coupled to an industrial process of the type used in monitoring a process variable of industrial process, the method comprising:
- physically coupling a piezoelectric transducer to the industrial process;
- receiving pressure pulsations from the industrial process through the physical coupling;
- sensing a process variable with a process variable sensor;
- providing a process variable output based upon the sensed process variable;
- coupling the pressure pulsations to the piezoelectric transducer and providing an electrical output from the piezoelectric transducer in response to the pressure pulsations;
- and
- providing the electrical output to electrical circuitry of the process device, the electrical output for providing power to the electrical circuitry.
Dependencies are inferred from the claim text.