Patent · US Active

Apparatus and method for detecting liquid level with a probe

US7603899B2 · kind B2 · utility

6Cited by

6References

19Claims

0Family size

Assignee

SHENZHEN MINDRAY BIO-MEDICAL ELECTRONICS CO., LTD. · CN

Inventors

Wei Li · Shanghai, CN
Qilin Liu · Shanghai, CN
Xingcal Zhu · Nanshan, CN

Key dates

Filing date	Dec 4, 2006
Grant date	Oct 20, 2009
Priority date	—
Expiry date	Feb 1, 2027

Classification

Technology area (CPC G)Physics
CPC primaryG01N2035/1025
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

The present application discloses a method and apparatus for detecting liquid level with probe, and the method comprising steps of: (A) acquiring a capacitance value of the probe; (B) generating an analog signal corresponding to the acquired capacitance value; (C) converting the generated analog signal into discrete signals at a predetermined sampling interval; (D) increasing or decreasing a counting value according to an amplitude of each the discrete signals, and outputting a liquid level contacting indication signal when the counting value reaches a predetermined counting threshold; and (E) controlling a movement of the probe according to the output liquid level contacting indication signal.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.