发明名称 |
AUTOMATIC PRECISION NON-CONTACT OPEN-LOOP FLUID DISPENSING |
摘要 |
A rugged, all-electronic fluid dispensing system for use with pipettes or in other contexts indirectly measures fluid flow by using a non-linear system model to correlate vacuum existing at the top of a column of suspended fluid. Non-contact operation is provided to eliminate the need for contact-type closed-loop fluid flow sensing and associated potential cross-contamination risks. In one particular exemplary non-limiting illustrative implementation, an electronic controller within a gun-shaped, cordless self-contained pipetter housing dynamically calculates valve opening time based on a non-linear equation. Calibration is used to derive equation constants, and column vacuum pressure before the valve is opened is used as the independent variable to derive a valve opening time that will result in accurate dispensing of a desired programmed fluid quantity. Repetitive automatic dispensing with accuracies greater than 1% are possible within the context of a relatively inexpensive portable pipette or device without the need for mechanically-complex positive displacement arrangements.
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申请公布号 |
US2008253934(A1) |
申请公布日期 |
2008.10.16 |
申请号 |
US20080131952 |
申请日期 |
2008.06.03 |
申请人 |
DITROLIO NICHOLAS M;CANFIELD ERIC L |
发明人 |
DITROLIO NICHOLAS M.;CANFIELD ERIC L. |
分类号 |
B01L3/02;G01N1/00;G01F3/00;G01F13/00;G01F15/00;G01F15/02;G01F15/06;G01F23/02;G01F25/00;G01N1/14;G01N35/10 |
主分类号 |
B01L3/02 |
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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