Method and System for Detecting Age, Hydration, and Functional States of Sensors Using Electrochemical Impedance Spectroscopy
First Claim
1. A method of detecting whether a sensor is aged beyond a specified sensor life, comprising:
- performing an EIS procedure between at least two electrodes of the sensor;
calculating an impedance value between the electrodes; and
comparing the impedance value against a threshold to determine if the sensor has aged beyond the specified sensor life.
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Accused Products
Abstract
A method and program prevents a user from bypassing a limit placed on a specified operating life of a sensor by disconnecting and reconnecting the sensor. The present invention checks a characteristic of the sensor to see if the sensor is used prior to the connection of the sensor, and rejects the sensor if the sensor is determined to have been used before. The process of checking the characteristic of the sensor involves performing an Electrochemical Impedance Spectroscopy (EIS) procedure and calculating an impedance value. The impedance value can be compared to various threshold values for a variety of purposes including the determination of age, condition, hydration, and stabilization of the sensor.
170 Citations
20 Claims
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1. A method of detecting whether a sensor is aged beyond a specified sensor life, comprising:
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performing an EIS procedure between at least two electrodes of the sensor;
calculating an impedance value between the electrodes; and
comparing the impedance value against a threshold to determine if the sensor has aged beyond the specified sensor life. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method of preventing a user from bypassing a limit placed on a specified operating life of a sensor by disconnecting and reconnecting the sensor, comprising:
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checking a characteristic of the sensor to see if the sensor is used prior to the connection of the sensor; and
rejecting the sensor if the sensor is determined to have been used before. - View Dependent Claims (11)
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12. A program for detecting whether a sensor is aged beyond a specified sensor life comprising a computer usable media including at least one computer program embedded therein that is capable or causing at least one computer to perform:
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performing an EIS procedure between at least two electrodes of the sensor;
calculating an impedance value; and
comparing the impedance value against a threshold to determine if the sensor has aged beyond the specified sensor life. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
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Specification