发明名称 |
Capacitively readout multi-element sensor array with common-mode cancellation |
摘要 |
An improved multi-element apparatus for detecting the presence of at least one chemical, biological or physical component in a monitored area comprising an array or single set of the following elements: a capacitive transducer having at least one cantilever spring element secured thereto, the cantilever element having an area thereof coated with a chemical having an affinity for the component to be detected; a pick-up plate positioned adjacent to the cantilever element at a distance such that a capacitance between the cantilever element and the pick-up plate changes as the distance between the cantilever element and the pick-up plate varies, the change in capacitance being a measurable variation; a detection means for measuring the measurable variation in the capacitance between the cantilever element and the pick-up plate that forms a measurement channel signal; and at least one feedback cantilever spring element positioned apart from the coated cantilever element, the cantilever element substantially unaffected by the component being monitored and providing a reference channel signal to the detection means that achieves a common mode cancellation between the measurement channel signal and reference channel signal.
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申请公布号 |
US6167748(B1) |
申请公布日期 |
2001.01.02 |
申请号 |
US19980144309 |
申请日期 |
1998.08.31 |
申请人 |
LOCKHEED MARTIN ENERGY RESEARCH CORPORATION;UNIVERSITY OF TENNESSEE RESEARCH CORPORATION |
发明人 |
BRITTON, JR. CHARLES L.;WARMACK ROBERT J.;BRYAN WILLIAM L.;JONES ROBERT L.;ODEN PATRICK IAN;THUNDAT THOMAS |
分类号 |
G01B7/16;G01B7/34;G01D5/241;G01M3/04;G01N19/10;G01N27/00;G01N27/24;G01N33/543;(IPC1-7):G01B7/16 |
主分类号 |
G01B7/16 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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