Apparatus for measuring concentration
AssigneeKabushiki Kaisha Toshiba
InventorsYuji Kubota, Kei Masunishi
Life of this patent
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Abstract
A concentration measuring apparatus includes a vibration member; a shielding unit that limits a flowable area of a solution to be measured close to the vibration member; a vibration control unit that vibrates the vibration member at a frequency; a variation measuring unit that measures a physical variation of the vibration member vibrated; an eigenfrequency computing unit that computes an eigenfrequency of the vibration member in the solution from the frequency and the variation; and a concentration obtaining unit that obtains a concentration of the solution from the eigenfrequency and a correspondence between the eigenfrequency and the concentration of the solution.
Claims15
A concentration measuring apparatus comprising:
- a vibration member;
- a shielding unit that limits a flowable area of a solution to be measured close to the vibration member;
- a vibration control unit that vibrates the vibration member at a frequency;
- a variation measuring unit that measures a physical variation of the vibration member vibrated;
- an eigenfrequency computing unit that computes an eigenfrequency of the vibration member in the solution from the frequency and the variation;
- and
- a concentration obtaining unit that obtains a concentration of the solution from the eigenfrequency and a correspondence between the eigenfrequency and the concentration of the solution.
Dependencies are inferred from the claim text.