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Method and device for detecting PH value of a solution

  • US 10,024,815 B2
  • Filed: 11/30/2012
  • Issued: 07/17/2018
  • Est. Priority Date: 12/02/2011
  • Status: Active Grant
First Claim
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1. A PH value detection device for detecting the PH value of a solution, comprising:

  • a first electrode and a second electrode, wherein the first electrode and the second electrode are configured to be inserted into the solution, the first electrode comprises a transition metal/transition metal oxide electrode, and the second electrode comprises an inert electrode;

    a power source configured to apply a bipolar rectangular potential pulse signal to the first electrode and the second electrode;

    a current detector connected between the first electrode and the second electrode and configured to detect a current flowing through the first electrode and the second electrode;

    a memory configured to pre-store a plurality of functions correlating current and PH values for a plurality of solution types, each function of the plurality of functions being associated with a type of solution to be detected; and

    a calculator configured to calculate the PH value of the solution, based on the detected current and the plurality of functions stored in the memory,wherein the plurality of functions are linear functions having slopes and y-intercepts which are determined using a plurality of types of solutions having different PH values that are in a first range, the first range being larger than a second range of PH values that includes the PH value of the solution to be detected.

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