Adjustment of electric potential by automatic titration
AssigneeEastman Kodak Company
InventorsJames M. Sanders, Ming-Jye Lin, Michael P. Lionti, Michael C. Schrader
Life of this patent
Estimating the term…
Abstract
Automatic titration method and apparatus provides for adjustment of the electric potential of a solution. A programmed computer responsive to iterative measurements of the potential regulates a two-phase adjustment process which approaches the desired electric potential (overall aim) using sub-aims thereby preventing overshoot of the overall aim.
Claims22
A titration control process for adjusting an electric potential of a material to a predetermined final aim, said process comprising the following steps:
- a. measuring the original electric potential of said material;
- b. calculating, in accordance with a predetermined start-up strategy, an amount of titrant to be added to said material as a calculated initial dispense and adding said calculated initial dispense to said material;
- c. calculating an amount of titrant to be added as a redispense of titrant to said material and, in accordance with said calculating, redispensing said titrant to said material based on (1) said calculating initial dispense of titrant to said material and (2) the electric potential of said subject material upon each redispense until said electric potential is adjusted a minimum amount;
- d. making final dispenses of said titrant to said material by adding a fixed, incremental quantity of titrant of said material, wherein said fixed, incremental quantity is based upon (1) either a linear extrapolation relative to the last two data points or an extrapolation based on a mathematical expression relative to three or more data points, relative to a series of sub-aims which correspond to potentials approaching said predetermined final aim and (2) measurements of said electric potential upon each said final dispense until said electric potential is adjusted to said predetermined final aim.
A titration control apparatus for adjusting an electric potential of a material to a predetermined final aim, said apparatus comprising:
- a. means for measuring the original electric potential of said material;
- b. means for calculating, in accordance with a predetermined start-up strategy, an amount of titrant to be added to said material as a calculated initial dispense and adding said calculated initial dispense to said material;
- c. means for calculating an amount of titrant to be added as a redispense of titrant to said material and, in accordance with said calculating, redispensing said titrant to said material based on (1) said calculated initial dispense of titrant to said material and (2) the electric potential of said material upon each redispense until said electric potential is adjusted a minimum amount;
- d. means for making final dispenses of said titrant to said material by adding a fixed, incremental quantity of titrant to said material, wherein said fixed, incremental quantity is based upon (1) either a linear extrapolation relative to the last two data points or an extrapolation based on a mathematical expression relative to three or more data points, relative to a series of sub-aims which correspond to potentials approaching said predetermined final aim and (2) measurements of said electric potential of said material upon each said final dispense until said electric potential is adjusted to said predetermined final aim.
Dependencies are inferred from the claim text.