Method and system for detecting age, hydration, and functional states of sensors using electrochemical impedance spectroscopy
US7985330B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 29, 2006 |
| Grant date | Jul 26, 2011 |
| Priority date | — |
| Expiry date | Dec 20, 2028 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2230/201
- WIPO fieldMedical technology
- WIPO sectorInstruments
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.