WO2006029345A3 - Digital capacitive sensing device for security and safety applications - Google Patents

Digital capacitive sensing device for security and safety applications Download PDF

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Publication number
WO2006029345A3
WO2006029345A3 PCT/US2005/032216 US2005032216W WO2006029345A3 WO 2006029345 A3 WO2006029345 A3 WO 2006029345A3 US 2005032216 W US2005032216 W US 2005032216W WO 2006029345 A3 WO2006029345 A3 WO 2006029345A3
Authority
WO
WIPO (PCT)
Prior art keywords
capacitive sensing
security
sensing device
safety applications
sensing system
Prior art date
Application number
PCT/US2005/032216
Other languages
French (fr)
Other versions
WO2006029345A2 (en
Inventor
Robert T Fergusson
Original Assignee
Invisa Inc
Robert T Fergusson
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 Invisa Inc, Robert T Fergusson filed Critical Invisa Inc
Publication of WO2006029345A2 publication Critical patent/WO2006029345A2/en
Publication of WO2006029345A3 publication Critical patent/WO2006029345A3/en

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B29/00—Checking or monitoring of signalling or alarm systems; Prevention or correction of operating errors, e.g. preventing unauthorised operation
    • G08B29/18—Prevention or correction of operating errors
    • G08B29/185—Signal analysis techniques for reducing or preventing false alarms or for enhancing the reliability of the system
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
    • G01D5/14—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage
    • G01D5/24—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying capacitance
    • G01D5/2405—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying capacitance by varying dielectric
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/22—Electrical actuation
    • G08B13/26—Electrical actuation by proximity of an intruder causing variation in capacitance or inductance of a circuit
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B29/00—Checking or monitoring of signalling or alarm systems; Prevention or correction of operating errors, e.g. preventing unauthorised operation
    • G08B29/18—Prevention or correction of operating errors
    • G08B29/20—Calibration, including self-calibrating arrangements
    • G08B29/22—Provisions facilitating manual calibration, e.g. input or output provisions for testing; Holding of intermittent values to permit measurement

Abstract

A capacitive sensing system (530) senses the presence of an object (600) proximate to an antenna (610) using a sensing field signal having a sensing field frequency. The capacitive sensing system (530) can be used in security systems, to provide an alarm if a valuable object is removed from where it can be detected. The capacitive sensing system (530) can also be used to provide an alarm when an object (600) is detected near a moving member, such as a parking barrier gate, sliding gate, elevator door, garage door, or window. The sensitivity of the system may be adjustable according to one or more conditions, such as position of the moving member, time of day, or operator inputs. Systems may also have a cut-out, in which alarms are suppressed.
PCT/US2005/032216 2004-09-09 2005-09-09 Digital capacitive sensing device for security and safety applications WO2006029345A2 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US60829804P 2004-09-09 2004-09-09
US60/608,298 2004-09-09
US11/222,339 2005-09-08
US11/222,339 US7187282B2 (en) 2004-09-09 2005-09-08 Digital capacitive sensing device for security and safety applications

Publications (2)

Publication Number Publication Date
WO2006029345A2 WO2006029345A2 (en) 2006-03-16
WO2006029345A3 true WO2006029345A3 (en) 2006-10-19

Family

ID=36033301

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2005/032216 WO2006029345A2 (en) 2004-09-09 2005-09-09 Digital capacitive sensing device for security and safety applications

Country Status (2)

Country Link
US (1) US7187282B2 (en)
WO (1) WO2006029345A2 (en)

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Also Published As

Publication number Publication date
WO2006029345A2 (en) 2006-03-16
US7187282B2 (en) 2007-03-06
US20060055534A1 (en) 2006-03-16

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