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NO961732L - An ice detector - Google Patents

An ice detector

Info

Publication number
NO961732L
NO961732L NO961732A NO961732A NO961732L NO 961732 L NO961732 L NO 961732L NO 961732 A NO961732 A NO 961732A NO 961732 A NO961732 A NO 961732A NO 961732 L NO961732 L NO 961732L
Authority
NO
Norway
Prior art keywords
ice
probe
detector
light sensors
output
Prior art date
Application number
NO961732A
Other languages
Norwegian (no)
Other versions
NO961732D0 (en
Inventor
Gary Robert Pritchard
Original Assignee
Penny & Giles Avionic Systems
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 Penny & Giles Avionic Systems filed Critical Penny & Giles Avionic Systems
Publication of NO961732D0 publication Critical patent/NO961732D0/en
Publication of NO961732L publication Critical patent/NO961732L/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64D—EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
    • B64D15/00—De-icing or preventing icing on exterior surfaces of aircraft
    • B64D15/20—Means for detecting icing or initiating de-icing
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B19/00—Alarms responsive to two or more different undesired or abnormal conditions, e.g. burglary and fire, abnormal temperature and abnormal rate of flow
    • G08B19/02—Alarm responsive to formation or anticipated formation of ice

Landscapes

  • Engineering & Computer Science (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)

Abstract

Is- og snødetektor med en rørformet kanal (10) montert på et stativ (12), som kan være festet til det ytre av f.eks. et helikopter. Luft trekkes gjennom kanalen (10) i retning av pilen vist på figuren ved hjelp av en venturianordning. Detektoren innbefatter en issonde i form av en elektrisk ledende stav (16) montert diametralt over kanalen (10), og tre separate diametralt anordnede lyskanaler er dannet i fronten av sonden (16) ved lyskanalene (20) og korresponderende lyssensorer (21). Ved bruk under isdannelse bygges is gradvis opp på sonden (16) slik at utgangssignalet til lyssensorene (21) avtar progressivt. Dersom utgangssignalet faller under et forutbestemt nivå blir sonden (16) oppvarmet for å smelte isen. En styreanordning sampler lyssensorenes utgangssignal ved forutbestemte tidsintervaller, og dersom noen av samplene adskiller seg fra umiddelbart forutgående sampel ved større en et forutbestemt trinn, tolkes dette som en momentan reduksjon på grunn av f.eks. snømugg, og ignoreres. Detektoren innbefatter videre en innretning for å indikere graden av snøfall og innretning for testing av påliteligheten av lyskanalene.Ice and snow detector with a tubular channel (10) mounted on a stand (12) which may be attached to the exterior of e.g. a helicopter. Air is drawn through the duct (10) in the direction of the arrow shown in the figure by means of a venturi device. The detector includes an ice probe in the form of an electrically conductive rod (16) mounted diametrically over the channel (10), and three separate diametrically arranged light channels are formed in the front of the probe (16) by the light channels (20) and corresponding light sensors (21). When used during ice formation, ice is gradually built up on the probe (16) so that the output of the light sensors (21) decreases progressively. If the output signal falls below a predetermined level, the probe (16) is heated to melt the ice. A control device samples the light sensors output at predetermined time intervals, and if any of the samples differs from the immediately preceding sample at greater than a predetermined stage, this is interpreted as a momentary reduction due to e.g. snow mold, and ignored. The detector further includes a device for indicating the degree of snowfall and a device for testing the reliability of the light channels.

NO961732A 1993-10-30 1996-04-29 An ice detector NO961732L (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9322442A GB2283315A (en) 1993-10-30 1993-10-30 Ice detector
PCT/GB1994/002385 WO1995012523A1 (en) 1993-10-30 1994-10-31 Ice detector

Publications (2)

Publication Number Publication Date
NO961732D0 NO961732D0 (en) 1996-04-29
NO961732L true NO961732L (en) 1996-06-12

Family

ID=10744414

Family Applications (1)

Application Number Title Priority Date Filing Date
NO961732A NO961732L (en) 1993-10-30 1996-04-29 An ice detector

Country Status (6)

Country Link
EP (1) EP0724527A1 (en)
JP (1) JPH09504865A (en)
CA (1) CA2175194A1 (en)
GB (1) GB2283315A (en)
NO (1) NO961732L (en)
WO (1) WO1995012523A1 (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7014357B2 (en) * 2002-11-19 2006-03-21 Rosemount Aerospace Inc. Thermal icing conditions detector
US7175136B2 (en) 2003-04-16 2007-02-13 The Boeing Company Method and apparatus for detecting conditions conducive to ice formation
EP1661100B1 (en) 2003-08-20 2009-10-07 The Boeing Company Methods and systems for detecting icing conditions
US7031871B2 (en) 2004-06-04 2006-04-18 Rosemount Aerospace, Inc. Sensor assembly for determining total temperature, static temperature and Mach number
US7331421B2 (en) 2005-03-30 2008-02-19 The Boeing Company Flow restrictors for aircraft inlet acoustic treatments, and associated systems and methods
US7845221B2 (en) * 2006-09-25 2010-12-07 Rosemount Aerospace, Inc. Detecting ice particles
CN110525664B (en) * 2019-05-16 2023-02-03 中国商用飞机有限责任公司 Ice crystal detector and detection method
CN110466779B (en) * 2019-08-20 2023-02-21 中国商用飞机有限责任公司 Ice crystal detector
CN114194399A (en) * 2021-12-10 2022-03-18 武汉航空仪表有限责任公司 Icing sensor based on short wave infrared type
US12345401B2 (en) 2022-01-10 2025-07-01 Goodrich Lighting Systems, Inc. Smart landing light deicing using advanced transparent metal mesh conductor

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA971652A (en) * 1972-10-23 1975-07-22 T. Rayman Ringer Ice detector
EP0076065A1 (en) * 1981-09-30 1983-04-06 The Secretary of State for Defence in Her Britannic Majesty's Government of the United Kingdom of Great Britain and Improvements in ice accretion instrumentation
US4851817A (en) * 1986-03-10 1989-07-25 Brossia Charles E Fiber optic probe system
FR2646396B1 (en) * 1989-04-28 1991-07-05 Thomson Csf FROST DETECTOR, PARTICULARLY FOR VEHICLE AND, MAINLY, FOR AIRCRAFT

Also Published As

Publication number Publication date
NO961732D0 (en) 1996-04-29
CA2175194A1 (en) 1995-05-11
EP0724527A1 (en) 1996-08-07
WO1995012523A1 (en) 1995-05-11
JPH09504865A (en) 1997-05-13
GB2283315A (en) 1995-05-03
GB9322442D0 (en) 1993-12-22

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