FI20105155L - Method for detecting objects in a level sensor system and level sensor system - Google Patents

Method for detecting objects in a level sensor system and level sensor system Download PDF

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Publication number
FI20105155L
FI20105155L FI20105155A FI20105155A FI20105155L FI 20105155 L FI20105155 L FI 20105155L FI 20105155 A FI20105155 A FI 20105155A FI 20105155 A FI20105155 A FI 20105155A FI 20105155 L FI20105155 L FI 20105155L
Authority
FI
Finland
Prior art keywords
sensor
crossing
strips
capacitance values
capacitance
Prior art date
Application number
FI20105155A
Other languages
Finnish (fi)
Swedish (sv)
Other versions
FI20105155A0 (en
FI20105155A7 (en
Inventor
Hannu Nummela
Original Assignee
Marimils Oy
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 Marimils Oy filed Critical Marimils Oy
Priority to FI20105155A priority Critical patent/FI20105155L/en
Publication of FI20105155A0 publication Critical patent/FI20105155A0/en
Priority to PCT/FI2011/050129 priority patent/WO2011101536A1/en
Publication of FI20105155A7 publication Critical patent/FI20105155A7/en
Publication of FI20105155L publication Critical patent/FI20105155L/en

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
    • G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
    • G01R27/26—Measuring inductance or capacitance; Measuring quality factor, e.g. by using the resonance method; Measuring loss factor; Measuring dielectric constants ; Measuring impedance or related variables
    • G01R27/2605—Measuring capacitance
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • G06F3/0443—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using a single layer of sensing electrodes

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Human Computer Interaction (AREA)
  • Geophysics And Detection Of Objects (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
  • Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)

Abstract

A planar sensor system, which system comprises a sensor (101) based on capacitive detection and an electronic detection unit (102), which sensor comprises conductive sensor areas, by examining the capacitance in which areas the objects on a sensor are monitored, and which system uses a planar sensor that comprises crossing conductive sensor strips (111a-111c, 112a - 112c), of which parallel first sensor strips are signal electrode strips and second sensor strips crossing with them in an insulated manner are earthing strips, and in which system crossing areas or crossing spots formed by superimposed strip parts insulated from each other are formed at the crossing points (113a-113i) of the strips in question, the capacitance of each crossing point is determined at the crossing points by controlling the earthing strips consecutively into connection with the ground potential, by measuring the capacitances and by controlling the received capacitance values to the control unit, and in which detection unit the capacitance values received at the crossing points are compared to the capacitance values received at the same crossing point at different moments of time and/or at different crossing points and based on the changes in capacitance values the presence and/or the state of the objects on the sensor is/are deduced.
FI20105155A 2010-02-17 2010-02-17 Method for detecting objects in a level sensor system and level sensor system FI20105155L (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
FI20105155A FI20105155L (en) 2010-02-17 2010-02-17 Method for detecting objects in a level sensor system and level sensor system
PCT/FI2011/050129 WO2011101536A1 (en) 2010-02-17 2011-02-10 A method for detecting objects in a planar sensor system and a planar sensor system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FI20105155A FI20105155L (en) 2010-02-17 2010-02-17 Method for detecting objects in a level sensor system and level sensor system

Publications (3)

Publication Number Publication Date
FI20105155A0 FI20105155A0 (en) 2010-02-17
FI20105155A7 FI20105155A7 (en) 2011-08-18
FI20105155L true FI20105155L (en) 2011-08-18

Family

ID=41727702

Family Applications (1)

Application Number Title Priority Date Filing Date
FI20105155A FI20105155L (en) 2010-02-17 2010-02-17 Method for detecting objects in a level sensor system and level sensor system

Country Status (2)

Country Link
FI (1) FI20105155L (en)
WO (1) WO2011101536A1 (en)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2529475C3 (en) * 1975-07-02 1981-10-08 Ewald Max Christian Dipl.-Phys. 6000 Frankfurt Hennig Electrical circuit arrangement for time-dependent measurement of physical quantities
DE69324067T2 (en) * 1992-06-08 1999-07-15 Synaptics Inc Object position detector
US8358276B2 (en) * 2007-12-21 2013-01-22 Apple Inc. Touch pad electrode design
KR101665148B1 (en) * 2008-08-01 2016-10-11 쓰리엠 이노베이티브 프로퍼티즈 컴파니 Methods of making composite electrodes

Also Published As

Publication number Publication date
FI20105155A0 (en) 2010-02-17
FI20105155A7 (en) 2011-08-18
WO2011101536A1 (en) 2011-08-25

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