公开(公告)号：US20250067588A1

公开(公告)日：2025-02-27

申请号：US18723771

申请日：2022-11-22

Applicant: Hitachi High-Tech Corporation

Inventor： Yuusuke KOURAI ,  Masaru TATEMI ,  Mutsumi SUZUKI ,  Kota SASAKI ,  Gorou YOSHIDA ,  Yuto TANAKA ,  Kenta TSUNASHIMA

IPC: G01F23/26

Abstract: Provided is a chemical analysis apparatus which has a stirring function for stirring, by using an ultrasonic element, a reagent or the like and a sample to be measured, and with which it is possible to infer the presence or absence of a reaction liquid and estimate the liquid amount of the reaction liquid without using a means such as a sensor and a visual inspection. This chemical analysis apparatus has an ultrasonic stirring mechanism and is characterized in that the ultrasonic stirring mechanism comprises: a piezoelectric element; a plurality of electrodes provided to the piezoelectric element; a power source unit for applying voltage to the electrodes; a detection unit for measuring electric impedance for each of the plurality of electrodes or for any combination of the electrodes; and an analysis unit for determining the liquid amount in a reaction vessel from the electric impedance detected by the detection unit. The chemical analysis apparatus is characterized in that the detection unit measures the electric impedance in a state where a reaction vessel having two or more different amounts of liquid dispensed therein faces the piezoelectric element, and the analysis unit estimates the liquid amount in the reaction vessel on the basis of the change amount in the electric impedance measured by the detection unit.

公开(公告)号：US20240344973A1

公开(公告)日：2024-10-17

申请号：US18293669

申请日：2022-07-05

Applicant: Hitachi High-Tech Corporation

Inventor： Yuusuke KOURAI ,  Mutsumi SUZUKI ,  Kota SASAKI ,  Gorou YOSHIDA ,  Yuto TANAKA ,  Kenta TSUNASHIMA

IPC: G01N21/27 ,  G01N21/25

CPC classification number: G01N21/272 ,  G01N21/253

Abstract: Provided is a chemical analysis device that facilitates the estimation of a failure position in failure diagnosis. This chemical analysis device comprises a plurality of reaction cells into which specimens and reagents are dispensed and measures the absorbances of mixed liquids of the specimens and reagents accommodated in the reaction cells using a light measurement system for emitting light onto the mixed liquids and measuring the light that has passed through the mixed liquids. The chemical analysis device comprises a diagnosis unit for failure diagnosis. The diagnosis unit accumulates time-series light-measurement-system data measured using a sample specimen for failure diagnosis and a reagent for failure diagnosis, creates a light measurement data population for failure diagnosis for each prescribed reaction cell, and carries out failure diagnosis by comparing the light measurement data of the light measurement data populations created for each prescribed reaction cell with a preset threshold.