Invention Grant
- Patent Title: Field device with self-testing of a piezoelectric transducer
- Patent Title (中): 具有自动测试压电传感器的现场设备
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Application No.: US14112815Application Date: 2012-05-28
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Publication No.: US09310412B2Publication Date: 2016-04-12
- Inventor: Jawahar Arunachalam , Udayashankar Bangalore Kasturi
- Applicant: Jawahar Arunachalam , Udayashankar Bangalore Kasturi
- Applicant Address: US MN Bloomington
- Assignee: Rosemount Inc.
- Current Assignee: Rosemount Inc.
- Current Assignee Address: US MN Bloomington
- Agency: Kinney & Lange, P.A.
- Priority: IN175/DEL/2012 20120120
- International Application: PCT/IB2012/052656 WO 20120528
- International Announcement: WO2013/108086 WO 20130725
- Main IPC: G01R31/02
- IPC: G01R31/02 ; G01L27/00 ; G01D3/08
Abstract:
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.
Public/Granted literature
- US20140320154A1 FIELD DEVICE WITH SELF-TESTING OF A PIEZOELECTRIC TRANSDUCER Public/Granted day:2014-10-30
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