WO2005045635A3 - Method and apparatus to reject electrical interference in a capacitive liquid level sensor system - Google Patents

Method and apparatus to reject electrical interference in a capacitive liquid level sensor system Download PDF

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Publication number
WO2005045635A3
WO2005045635A3 PCT/US2004/035979 US2004035979W WO2005045635A3 WO 2005045635 A3 WO2005045635 A3 WO 2005045635A3 US 2004035979 W US2004035979 W US 2004035979W WO 2005045635 A3 WO2005045635 A3 WO 2005045635A3
Authority
WO
WIPO (PCT)
Prior art keywords
probe
capacitance
measuring
liquid level
level sensor
Prior art date
Application number
PCT/US2004/035979
Other languages
French (fr)
Other versions
WO2005045635A2 (en
Inventor
Richard R Harazin
Ronald A Zweifel
Original Assignee
Perkinelmer Las Inc
Richard R Harazin
Ronald A Zweifel
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Perkinelmer Las Inc, Richard R Harazin, Ronald A Zweifel filed Critical Perkinelmer Las Inc
Priority to EP04796734.4A priority Critical patent/EP1690157B1/en
Priority to CA2544434A priority patent/CA2544434C/en
Publication of WO2005045635A2 publication Critical patent/WO2005045635A2/en
Publication of WO2005045635A3 publication Critical patent/WO2005045635A3/en

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Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01FMEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F23/00Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
    • G01F23/22Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
    • G01F23/26Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N35/00Automatic analysis not limited to methods or materials provided for in any single one of groups G01N1/00 - G01N33/00; Handling materials therefor
    • G01N35/10Devices for transferring samples or any liquids to, in, or from, the analysis apparatus, e.g. suction devices, injection devices
    • G01N35/1009Characterised by arrangements for controlling the aspiration or dispense of liquids
    • G01N2035/1025Fluid level sensing

Abstract

Methods, systems, and computer program products for measuring a capacitance (C1) between a probe (11) and a liquid, pausing movement of the probe (11) based on a rate of change of the capacitance (C1), further measuring the capacitance (C1) while the probe (11) is paused, and, based on the further measurements, performing one or more of: resuming movement of the probe (11), determining a position of the probe (11), aspirating liquid into the probe (11), and dispensing from the probe (11). Resuming movement of the probe (11) can include returning iteratively to measuring a capacitance (C1), and the further measuring can be performed for a time interval that can vary based on the further measured capacitance(s) (C1), a probe (11) movement characteristic, and/or a sampling rate.
PCT/US2004/035979 2003-10-30 2004-10-29 Method and apparatus to reject electrical interference in a capacitive liquid level sensor system WO2005045635A2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP04796734.4A EP1690157B1 (en) 2003-10-30 2004-10-29 Method and apparatus to reject electrical interference in a capacitive liquid level sensor system
CA2544434A CA2544434C (en) 2003-10-30 2004-10-29 Method and apparatus to reject electrical interference in a capacitive liquid level sensor system

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US48158103P 2003-10-30 2003-10-30
US60/481,581 2003-10-30
US10/975,658 US7191647B2 (en) 2003-10-30 2004-10-28 Method and apparatus to reject electrical interference in a capacitive liquid level sensor system
US10/975,658 2004-10-28

Publications (2)

Publication Number Publication Date
WO2005045635A2 WO2005045635A2 (en) 2005-05-19
WO2005045635A3 true WO2005045635A3 (en) 2006-11-09

Family

ID=34555553

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2004/035979 WO2005045635A2 (en) 2003-10-30 2004-10-29 Method and apparatus to reject electrical interference in a capacitive liquid level sensor system

Country Status (4)

Country Link
US (3) US7191647B2 (en)
EP (1) EP1690157B1 (en)
CA (1) CA2544434C (en)
WO (1) WO2005045635A2 (en)

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US8552316B2 (en) * 2010-06-22 2013-10-08 Infineon Technologies Ag Sensor measurement system using pulsed current signals
US8809069B2 (en) 2011-05-20 2014-08-19 Perkinelmer Health Sciences, Inc. Lab members and liquid handling systems and methods including same
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US9073052B2 (en) 2012-03-30 2015-07-07 Perkinelmer Health Sciences, Inc. Lab members and liquid handling systems and methods including same
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US9347813B2 (en) * 2014-01-28 2016-05-24 Analog Devices GmbH Capacitive sensing probe motion control system
JP6280777B2 (en) * 2014-03-24 2018-02-14 シスメックス株式会社 Analysis device and liquid level detection method in analysis device
WO2016069018A1 (en) * 2014-10-31 2016-05-06 Hewlett Packard Enterprise Development Lp Server device with capacitive circuit
EP3112861B1 (en) * 2015-07-03 2018-08-29 Siemens Healthcare Diagnostics Products GmbH Method for touch detection for a pipetting needle
CN107709958B (en) * 2015-07-14 2020-04-14 深圳迈瑞生物医疗电子股份有限公司 Sampling mechanism, air suction detection method thereof and sample analyzer
CN105222866A (en) * 2015-09-14 2016-01-06 新乡市恒冠仪表有限公司 A kind of condenser type intelligent boiler liquid level of steam drum meter
CZ307641B6 (en) * 2015-10-02 2019-01-30 Biovendor Instruments A.S. A multi-axis handling device intended for transmission of biological samples and the method of transferring biological samples by means of the multi-axis handling device
US10379131B2 (en) 2015-11-18 2019-08-13 Elbit Systems Of America/Kmc Systems, Inc. Systems and methods for detecting a liquid level
TWI604182B (en) * 2016-04-26 2017-11-01 諾貝爾生物有限公司 Syringe assembly and method of using the same
US11231309B2 (en) * 2016-05-11 2022-01-25 Siemens Healthcare Diagnostics Inc. Quick connection for liquid level sense-enabled metering probe
WO2017223214A1 (en) * 2016-06-22 2017-12-28 Abbott Laboratories Liquid level sensing apparatus and related methods
CH712735A1 (en) * 2016-07-22 2018-01-31 Tecan Trading Ag Pipetting device with a liquid volume sensor and liquid processing system.
CN110146141B (en) * 2019-04-26 2020-06-05 浙江大学 Liquid level detection device and method for improved sleeve type sampling needle
CN111854888B (en) * 2020-07-25 2021-07-02 珠海格力电器股份有限公司 Water level detection method and device, storage medium and kettle

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Also Published As

Publication number Publication date
US20090000374A1 (en) 2009-01-01
EP1690157A2 (en) 2006-08-16
CA2544434A1 (en) 2005-05-19
US7191647B2 (en) 2007-03-20
US20070137315A1 (en) 2007-06-21
WO2005045635A2 (en) 2005-05-19
US20050092080A1 (en) 2005-05-05
EP1690157B1 (en) 2018-03-07
US7387023B2 (en) 2008-06-17
EP1690157A4 (en) 2007-05-09
CA2544434C (en) 2013-09-10
US7836763B2 (en) 2010-11-23

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