OXIDATION/REDUCTION MEASUREMENT

• US 20120298529A1
• Filed: 04/30/2012
• Published: 11/29/2012
• Est. Priority Date: 05/26/2011
• Status: Active Grant

• Current Assignee: Hach Company (Veralto Corp.)
• Original Assignee: Hach Company (Veralto Corp.)
• Inventors: Rick, David Langley, Malkov, Vadim B.
• Granted Patent: US 8,999,139 B2
• Time in Patent Office: Days
• US Class Current: 205/782
• CPC Class Codes: G01F 1/002 wherein the flow is in an open channel
• CPC Class Codes: G01N 27/4167 pH electrodes therefor G01N27/302, G01N27/36
• CPC Class Codes: G01N 27/4168 Oxidation-reduction potential, e.g. for chlorination of water water analysis G01N33/18
• CPC Class Codes: G01N 33/182 specific anions in water electrochemical analysis G01N27/26; detection of ions by colorimetry G01N31/22
• CPC Class Codes: Y10T 436/115831 Condition or time responsive
• CPC Class Codes: Y10T 436/12 Condition responsive control

Abstract

Oxidation/reduction measurement is described. An aspect provides an oxidation/reduction quantification method, including: receiving intermittent oxidizer/reducer reference measurements from one or more reference sensors; receiving one or more substantially continuous oxidizer/reducer-related measurements from one or more corroboration sensors; and processing the one or more substantially continuous oxidizer/reducer-related measurements with the intermittent oxidizer/reducer reference measurements to generate substantially continuous representative oxidizer/reducer measurements. Other aspects are described.

Claims

1. An oxidation/reduction system, comprising:

one or more reference sensors configured to generate intermittent oxidizer/reducer reference measurements;

one or more corroboration sensors configured to generate one or more substantially continuous oxidizer/reducer-related measurements; and

meter electronics in communication with the one or more reference sensors and the one or more corroboration sensors;

wherein the meter electronics are configured to process the one or more substantially continuous oxidizer/reducer-related measurements with the intermittent oxidizer/reducer reference measurements to generate substantially continuous representative oxidizer/reducer measurements.

2. The oxidation/reduction system of claim 1, wherein the one or more substantially continuous oxidizer/reducer-related measurements include substantially continuous pH measurements, substantially continuous oxidation-reduction potential (ORP) measurements, and substantially continuous temperature measurements.

3. The oxidation/reduction system of claim 2, wherein the substantially continuous pH measurements substantially correspond to an oxidizer/reducer form.

4. The oxidation/reduction system of claim 1, wherein the substantially continuous representative oxidizer/reducer measurements are produced using a predictive system model.

5. The oxidation/reduction system of claim 4, wherein the predictive system model comprises an unscented Kalman filter.

6. The oxidation/reduction system of claim 1, wherein the meter electronics are further configured to:

compare one or more elements of the predictive system model to one or more corresponding thresholds; and

perform one or more corrective actions if the one or more elements do not satisfy the one or more corresponding thresholds.

7. The oxidation/reduction system of claim 1, wherein the one or more reference sensors generate the intermittent oxidizer/reducer reference measurements using light absorbance.

8. An oxidation/reduction system, comprising:

a reference sensor configured to generate intermittent oxidizer/reducer reference measurements;

a pH sensor configured to generate substantially continuous pH measurements;

an oxidation-reduction potential (ORP) sensor configured to generate substantially continuous ORP measurements; and

meter electronics in communication with the reference sensor, the pH sensor, and the ORP sensor;

wherein the meter electronics are configured to process the one or more substantially continuous ORP measurements and substantially continuous pH measurements with the intermittent oxidizer/reducer reference measurements to generate substantially continuous representative oxidizer/reducer measurements.

9. The oxidation/reduction system of claim 8, wherein the substantially continuous pH measurements substantially correspond to an oxidizer/reducer form.

10. The oxidation/reduction system of claim 8, wherein the representative oxidizer/reducer measurements are produced using a predictive system model.

11. The oxidation/reduction system of claim 10, wherein the predictive system model comprises an unscented Kalman filter.

12. The oxidation/reduction system of claim 10, wherein the meter electronics are further configured to:

compare one or more elements of the predictive system model to one or more corresponding thresholds; and

perform one or more corrective actions if the one or more elements do not satisfy the one or more corresponding thresholds.

13. The oxidation/reduction system of claim 8, wherein the reference sensor generates the intermittent oxidizer/reducer reference measurements using light absorbance.

14. An oxidation/reduction quantification method, comprising:

receiving intermittent oxidizer/reducer reference measurements from one or more reference sensors;

receiving one or more substantially continuous oxidizer/reducer-related measurements from one or more corroboration sensors; and

processing the one or more substantially continuous oxidizer/reducer-related measurements with the intermittent oxidizer/reducer reference measurements to generate representative oxidizer/reducer measurements.

15. The method of claim 14, wherein the one or more substantially continuous oxidizer/reducer-related measurements include substantially continuous pH measurements, substantially continuous oxidation-reduction potential (ORP) measurements, and substantially continuous temperature measurements.

16. The method of claim 15, wherein the substantially continuous pH measurements substantially corresponding to an oxidizer/reducer form.

17. The method of claim 14, wherein the representative oxidizer/reducer measurements are produced using a predictive system model.

18. The method of claim 17, wherein the predictive system model comprises an unscented Kalman filter.

19. The method of claim 17, further comprising:

comparing one or more elements of the predictive system model to one or more corresponding thresholds; and

performing one or more corrective actions if the one or more elements do not satisfy the one or more corresponding thresholds.

20. The method of claim 14, wherein the one or more reference sensors generate the intermittent oxidizer/reducer reference measurements using light absorbance.