Back to results
US 12,663,393 B2Granted
pH sensor measurement
AssigneeGeorg Fischer Signet LLC
InventorsJun Huang, Calin Ciobanu, Geordon Alexander Worley, Jerome Brent Ford
Life of this patent
Estimating the term…
Abstract
A method is provided for measuring the impedance of a pH sensor electrode. The method includes applying a positive voltage pulse to the pH electrode and taking a plurality of samples of the sensor voltage response and, from those samples, estimating the impedance of the sensor electrode. Then, a negative voltage pulse width is dynamically adjusted to cancel out the induced charges from the positive voltage on the pH sensor so that the sensor quickly recovers to read subsequent media pH levels.
Claims7
A method for measuring the impedance of a pH sensor electrode comprising:
- applying a positive voltage pulse to the pH electrode;
- taking a plurality of samples of the electrode voltage response to the positive pulse, the samples being equally timed from each other during application of the positive pulse;
- from those samples, estimating the impedance of the electrode;
- applying a negative voltage pulse to cancel out induced charges from the positive voltage on the electrode so that the electrode quickly recovers to read media pH levels;
- and
- wherein the negative pulse is dynamically adjusted as a function of the electrode voltage response.
3 more elements
Dependencies are inferred from the claim text.