Method for verifying sensor condition
First Claim
1. A method of verifying sensor condition comprising:
- mounting an electromagnetic sensor on a test material surface;
periodically measuring at least one electrical property of the material under a sensor footprint, with sensor response measurements being made at two or more test material temperatures; and
verifying sensor condition from the sensor response with change in temperature.
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Accused Products
Abstract
Sensor condition verification may be performed on electromagnetic sensors and sensor arrays mounted to a material surface. The sensors typically have a periodic winding or electrode structure that creates a periodic sensing field when driven by an electrical signal. The sensors can be thin and flexible so that they conform to the surface of the test material. Monitoring the conductivity changes of a test material, with changes in temperature, may provide a mechanism for testing the integrity of the sensor. Changes in the conductivity, due to changes in temperature, without significant lift-off changes may verify the calibration of the sensor and that the sensor elements themselves are intact.
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Citations
20 Claims
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1. A method of verifying sensor condition comprising:
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mounting an electromagnetic sensor on a test material surface; periodically measuring at least one electrical property of the material under a sensor footprint, with sensor response measurements being made at two or more test material temperatures; and verifying sensor condition from the sensor response with change in temperature. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A method of verifying sensor condition comprising:
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mounting an electromagnetic sensor on a test material surface, where the sensor comprises a drive conductor to carry an applied electric current and at least one sensing element to measure the electrical properties of the material under test; periodically measuring at least one electrical property of the material under a sensor footprint, with sensor response measurements being made at two or more test material temperatures13; and verifying sensor condition from the sensor response with change in temperature. - View Dependent Claims (18, 19, 20)
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Specification