Liquid level detecting device and sample applying system
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United States of America Patent
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Jan 22, 2013
Grant Date -
Oct 14, 2010
app pub date -
Apr 8, 2010
filing date -
Apr 9, 2009
priority date (Note) -
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Abstract
Various embodiments disclose a liquid level detecting device and method, which comprises: a control unit configured to output control instructions corresponding to environmental information according to the environmental information of a location of a sampling needle; an amplifying unit configured to set a gain according to the control instructions; a converting unit configured to receive and convert a capacitance signal from the sampling needle to a voltage signal; the amplifying unit receives the voltage signal and amplifies the voltage signal according to the gain; the control unit receives the amplified voltage signal and compares the amplified voltage signals with a preset voltage threshold to determine whether the sampling needle contacts the liquid level. Some embodiments further disclose a sample application system. Various embodiments consider both sensitivity and reliability of a detection system and is adaptable to various detection environments.
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