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GB0423033D0 - Improvements in and relating to crack detectors - Google Patents

Improvements in and relating to crack detectors

Info

Publication number
GB0423033D0
GB0423033D0 GBGB0423033.0A GB0423033A GB0423033D0 GB 0423033 D0 GB0423033 D0 GB 0423033D0 GB 0423033 A GB0423033 A GB 0423033A GB 0423033 D0 GB0423033 D0 GB 0423033D0
Authority
GB
United Kingdom
Prior art keywords
resistance
crack
threshold
relating
heatable layer
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
GBGB0423033.0A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Pilkington Group Ltd
Original Assignee
Pilkington PLC
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 Pilkington PLC filed Critical Pilkington PLC
Priority to GBGB0423033.0A priority Critical patent/GB0423033D0/en
Publication of GB0423033D0 publication Critical patent/GB0423033D0/en
Priority to AT05256358T priority patent/ATE382251T1/en
Priority to DE602005004000T priority patent/DE602005004000T2/en
Priority to EP05256358A priority patent/EP1648200B1/en
Ceased legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/84—Heating arrangements specially adapted for transparent or reflecting areas, e.g. for demisting or de-icing windows, mirrors or vehicle windshields
    • H05B3/86—Heating arrangements specially adapted for transparent or reflecting areas, e.g. for demisting or de-icing windows, mirrors or vehicle windshields the heating conductors being embedded in the transparent or reflecting material
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B1/00—Details of electric heating devices
    • H05B1/02—Automatic switching arrangements specially adapted to apparatus ; Control of heating devices
    • H05B1/0227—Applications
    • H05B1/023—Industrial applications
    • H05B1/0236—Industrial applications for vehicles
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
    • H05B2203/013—Heaters using resistive films or coatings
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
    • H05B2203/035—Electrical circuits used in resistive heating apparatus
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B2214/00—Aspects relating to resistive heating, induction heating and heating using microwaves, covered by groups H05B3/00, H05B6/00
    • H05B2214/02—Heaters specially designed for de-icing or protection against icing

Landscapes

  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
  • Automatic Disk Changers (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Air-Conditioning For Vehicles (AREA)
  • Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
  • Investigating Or Analyzing Materials Using Thermal Means (AREA)

Abstract

There is disclosed a crack detector (30) for a glazing (2) comprising a heatable layer (8), the detector (30) comprising a resistance measurer (32) arranged to repeatedly measure a resistance of the heatable layer (8) of the glazing (2) and to output a resistance value; a threshold determiner (38) arranged repeatedly to determine a threshold resistance indicative of a resistance of the heatable layer (8) characteristic of a crack, which threshold resistance is determined based on a plurality of the previous resistance values; and a comparator (40) arranged to compare the threshold resistance with the measured resistance value, thereby to determine if a crack is present.
GBGB0423033.0A 2004-10-16 2004-10-16 Improvements in and relating to crack detectors Ceased GB0423033D0 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
GBGB0423033.0A GB0423033D0 (en) 2004-10-16 2004-10-16 Improvements in and relating to crack detectors
AT05256358T ATE382251T1 (en) 2004-10-16 2005-10-13 IMPROVEMENTS IN AND RELATING TO BREAK DETECTORS FOR ELECTRICAL HEATED WINDOWS
DE602005004000T DE602005004000T2 (en) 2004-10-16 2005-10-13 Improvements in and relating to break detectors for electrically heatable disks
EP05256358A EP1648200B1 (en) 2004-10-16 2005-10-13 Improvements in and relating to crack detectors for electrically heated windows

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GBGB0423033.0A GB0423033D0 (en) 2004-10-16 2004-10-16 Improvements in and relating to crack detectors

Publications (1)

Publication Number Publication Date
GB0423033D0 true GB0423033D0 (en) 2004-11-17

Family

ID=33462861

Family Applications (1)

Application Number Title Priority Date Filing Date
GBGB0423033.0A Ceased GB0423033D0 (en) 2004-10-16 2004-10-16 Improvements in and relating to crack detectors

Country Status (4)

Country Link
EP (1) EP1648200B1 (en)
AT (1) ATE382251T1 (en)
DE (1) DE602005004000T2 (en)
GB (1) GB0423033D0 (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB201309549D0 (en) 2013-05-29 2013-07-10 Pilkington Group Ltd Glazing
US10755123B1 (en) * 2017-05-16 2020-08-25 Apple Inc. Window defect sensing and image processing
GB2569120B (en) * 2017-12-05 2021-02-10 Edwards Ltd Thermal management method and apparatus
US11229091B2 (en) * 2018-05-30 2022-01-18 Betterfrost Technologies, Inc. Continuous resistance and proximity checking for high power deicing and defogging systems
JP7350060B2 (en) * 2018-09-05 2023-09-25 ピーピージー・インダストリーズ・オハイオ・インコーポレイテッド System and method for monitoring the resistance of a conductive coating as an indicator of the condition of the conductive coating
DE102018218621B4 (en) * 2018-10-31 2024-05-16 Audi Ag Method for providing control information to a vehicle in an emergency, emergency system, vehicle, computer program and computer-readable medium
US11780594B2 (en) * 2019-10-02 2023-10-10 Ppg Industries Ohio, Inc. Transparency including a wireless sensor
CN113715768B (en) * 2020-05-25 2023-02-03 华晨宝马汽车有限公司 Protection system for avoiding injury of passenger when vehicle glass is broken and vehicle
US12198484B2 (en) 2021-08-18 2025-01-14 Robert Bosch Gmbh Systems and methods for detecting windshield cracks
FR3143543A1 (en) * 2022-12-19 2024-06-21 Airbus Operations IMPROVED GLASS BREAK DETECTION SYSTEM, AND AIRCRAFT COMPRISING SUCH A SYSTEM.

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4565919A (en) * 1984-06-14 1986-01-21 Donnelly Corporation Crack detector for electrically conductive windshield
US5072098A (en) * 1990-06-11 1991-12-10 Chrysler Corporation Electrically heated windshield controller
US5981907A (en) * 1997-10-09 1999-11-09 Ut Automotive Dearborn, Inc. Rear wiper monitoring theft deterrent circuit
US6020576A (en) * 1997-10-09 2000-02-01 Lear Automotive Dear Born, Inc. Temperature and windshield crack detector
DE10125639C2 (en) * 2001-05-25 2003-12-24 Audi Ag Method for operating a window heater in a vehicle and window heater control unit

Also Published As

Publication number Publication date
DE602005004000T2 (en) 2008-12-18
EP1648200A1 (en) 2006-04-19
DE602005004000D1 (en) 2008-02-07
EP1648200B1 (en) 2007-12-26
ATE382251T1 (en) 2008-01-15

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Legal Events

Date Code Title Description
AT Applications terminated before publication under section 16(1)