Oxidation/reduction measurement

• US 8,999,139 B2
• Filed: 04/30/2012
• Issued: 04/07/2015
• Est. Priority Date: 05/26/2011
• Status: Active Grant

• Current Assignee: Hach Company (Veralto Corp.)
• Original Assignee: Hach Company (Veralto Corp.)
• Inventors: Malkov, Vadim B., Rick, David Langley
• Primary Examiner(s): Noguerola, Alex
• Assistant Examiner(s): ROSENWALD, STEVEN ERIC
• Application Number:
  US13/459,561
• Publication Number:
  US 20120298529A1
• Time in Patent Office: 1,072 Days
• Field of Search: 205/775, 205/778.5, 205/782, 436/50, 436/55, 702/22
• US Class Current: 205/775
• 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
• 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 quantification method, comprising:

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

receiving continuous oxidizer/reducer-related measurements from one or more corroboration sensors, wherein the continuous oxidizer/reducer-related measurements include continuous oxidation-reduction potential (ORP) measurements and continuous pH measurements; and

combining the continuous oxidizer/reducer-related measurements with the intermittent oxidizer/reducer reference measurements to generate representative oxidizer/reducer measurements.

2. The method of claim 1, wherein the continuous oxidizer/reducer-related measurements include continuous temperature measurements.

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

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

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

6. The method of claim 4, 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.

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