FIELD DEVICE WITH SELF-TESTING OF A PIEZOELECTRIC TRANSDUCER

An industrial process field device having a piezoelectric transducer performs self-testing of the condition of the piezoelectric transducer during a self-test mode. A charging current is supplied to the piezoelectric transducer, and voltage on the piezoelectric transducer as a result of the charging...

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Bibliographische Detailangaben
Hauptverfasser:	ARUNACHALAM, JAWAHAR, KASTURI, UDAYASHANKAR BANGALORE
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVEREDIN A SINGLE OTHER SUBCLASS MEASURING MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER,MECHANICAL EFFICIENCY, OR FLUID PRESSURE MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR PHYSICS TARIFF METERING APPARATUS TESTING
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Beschreibung
Zusammenfassung:	An industrial process field device having a piezoelectric transducer performs self-testing of the condition of the piezoelectric transducer during a self-test mode. A charging current is supplied to the piezoelectric transducer, and voltage on the piezoelectric transducer as a result of the charging current is monitored. A diagnostic test result indicating condition of the piezoelectric transducer is produced based on the magnitude of the voltage. Un appareil de terrain de processus industriel présentant un transducteur piézo-électrique effectue un autotest de l'état du transducteur piézo-électrique au cours d'un mode autotest. Un courant de charge est appliqué au transducteur piézoélectrique et la tension au niveau du transducteur piézoélectrique résultant du courant de charge est surveillée. Un résultat de test de diagnostic indiquant l'état du transducteur piézo-électrique est produit sur la base de la grandeur de la tension.