Apparatus and method for detecting liquid level with a probe
AssigneeShenzhen Mindray Bio-Medical Electronics Co., Ltd.
InventorsWei Li, Qilin Liu, Xingcal Zhu
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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.
Claims19
An apparatus for detecting liquid level with a probe, comprising:
- a pipetting probe configured for causing output of a capacitance value;
- a generation module configured for generating an analog signal corresponding to the capacitance value;
- a signal converting module configured for converting the analog signal into discrete signals;
- a signal processing module configured for causing a determination of whether to adopt a slope detecting process or an amplitude detecting process for processing the discrete signals based at least upon an amount of liquid detected and for causing to output a liquid level contacting indication signal;
- and
- a control module configured for controlling a movement of the pipetting probe based at least upon the liquid level contacting indication signal.
A method for detecting liquid level with a probe, comprising steps of:
- identifying a capacitance value of the probe;
- generating an analog signal corresponding to the capacitance value;
- converting the generated analog signal into discrete signals;
- determining whether to adopt a slope detecting process or an amplitude detecting process for processing the discrete signals and outputting a liquid level contacting indication signal;
- and
- controlling a movement of the probe based at least upon the output liquid level contacting indication signal.
Dependencies are inferred from the claim text.