Title:
圧電変換器の状態監視
Document Type and Number:
Japanese Patent JP7359949
Kind Code:
B2
Abstract:
An industrial process field device includes a piezoelectric transducer, a sensor circuit, a test circuit, a controller and a communications circuit. The sensor circuit generates a sensor signal indicating a process variable based on a voltage across the piezoelectric transducer. The test circuit is configured to apply a voltage pulse having a pulse voltage to the piezoelectric transducer that induces a response signal, and capture peak positive and negative voltages of the response signal. The controller calculates a current condition value of the piezoelectric transducer based on the peak positive voltage, the peak negative voltage and the pulse voltage, and generates a diagnostic test result based on a comparison of the current condition value to a reference condition value corresponding to a properly operating piezoelectric transducer. The communications circuit communicates the process variable and the diagnostic test result to an external control unit over a process control loop.
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Inventors:
Bogdanov, Vladimir Dmitrievich
Application Number:
JP2022516461A
Publication Date:
October 11, 2023
Filing Date:
September 25, 2019
Export Citation:
Assignee:
Rosemount Incorporated
International Classes:
G05B23/02
Domestic Patent References:
| JP2015504169A | ||||
| JP9505137A | ||||
| JP2009236596A |
Attorney, Agent or Firm:
Patent Attorney Corporation Taiyo International Patent Office