Liquid sending system for liquid chromatograph
US12105069B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 16, 2019 |
| Grant date | Oct 1, 2024 |
| Priority date | — |
| Expiry date | Apr 4, 2041 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2030/027
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A liquid sending failure detector acquires periodically a liquid sending pressure of a liquid sending mechanism consecutively sends liquid using at least one plunger pump that sends liquid by reciprocally driving a plunger such that a fluctuation is read in one driving period of the liquid sending mechanism, and detect a liquid sending failure of the liquid sending mechanism using an acquired liquid sending pressure. The liquid sending failure detector executes a pulsation detection step of obtaining a fluctuation range of the liquid sending pressure in a certain driving period of the liquid sending mechanism and detecting pulsation on a condition that a count of consecutive periods in which the fluctuation range exceeds a predetermined reference value exceeds a predetermined reference count, and a liquid sending failure detection step of detecting a liquid sending failure of the liquid sending mechanism when the pulsation is detected in the pulsation detection step.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.