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US 2021/0084718 A1Published application
Monitoring and extending heater life through power supply polarity switching
AssigneeRosemount Aerospace Inc.
InventorsMagdi A. Essawy, Cuong Tho Huynh
Life of this patent
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Abstract
A method and system for monitoring a heating arrangement includes applying a first polarity voltage to a heater of the heating arrangement, detecting a first polarity heating leakage current, applying a second polarity voltage to the heating arrangement, detecting a second polarity heating leakage current, and determining health of the heating arrangement via the first polarity heating leakage current and the second polarity heating leakage current.
Claims20
A method of monitoring a heating arrangement, the method comprising:
- applying a first polarity voltage to a heater of the heating arrangement;
- detecting a first polarity heating leakage current;
- applying a second polarity voltage to the heating arrangement;
- detecting a second polarity heating leakage current;
- and
- determining health of the heating arrangement via the first polarity heating leakage current and the second polarity heating leakage current.
3 more elements
A heating arrangement monitoring system comprising:
- a leakage current measurement circuit configured to measure a heating leakage current, wherein the heating leakage current is either:
- a first polarity heating leakage current as a result of applying a first polarity voltage to the heating arrangement;
- or
- a second polarity heating leakage current as a result of applying a second polarity voltage to the heating arrangement;
- and
- a processor, configured to determine a health of the heating arrangement based on one or more measured values of the first polarity heating leakage current and the second polarity heating leakage current.
3 more elements
Dependencies are inferred from the claim text.