CA2239928A1 - Apparatus for monitoring opening of sealed containers - Google Patents

Apparatus for monitoring opening of sealed containers

Info

Publication number
CA2239928A1
CA2239928A1 CA 2239928 CA2239928A CA2239928A1 CA 2239928 A1 CA2239928 A1 CA 2239928A1 CA 2239928 CA2239928 CA 2239928 CA 2239928 A CA2239928 A CA 2239928A CA 2239928 A1 CA2239928 A1 CA 2239928A1
Authority
CA
Canada
Prior art keywords
radio
receiver
receiver unit
opening
enclosure
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.)
Granted
Application number
CA 2239928
Other languages
French (fr)
Other versions
CA2239928C (en
Inventor
Andre Gagnon
Christian Tremblay
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.)
TEKTRAP SYSTEM Inc
Original Assignee
Individual
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
Priority claimed from CA002207371A external-priority patent/CA2207371A1/en
Application filed by Individual filed Critical Individual
Priority to CA 2239928 priority Critical patent/CA2239928C/en
Publication of CA2239928A1 publication Critical patent/CA2239928A1/en
Application granted granted Critical
Publication of CA2239928C publication Critical patent/CA2239928C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B15/00—Identifying, scaring or incapacitating burglars, thieves or intruders, e.g. by explosives
    • G08B15/001—Concealed systems, e.g. disguised alarm systems to make covert systems
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/22—Electrical actuation
    • G08B13/24—Electrical actuation by interference with electromagnetic field distribution
    • G08B13/2491—Intrusion detection systems, i.e. where the body of an intruder causes the interference with the electromagnetic field

Abstract

Apparatus for monitoring opening of sealed enclosures, especially, but not exclusively, sealed containers containing goods-in-transit, such as goods vehicles, maritime containers or transport containers of the kind carried by tractor- trailers, ships, trains or aeroplanes comprises a radio receiver unit having at least one antenna for reception of radio signals. The receiver unit is housed within the enclosure and operates to scan a predetermined band of radio frequencies, periodically or continuously, and detect a sudden change in signal level. When it detects such a change in radio signal level, the receiver generates an alarm signal. Alternatively, the receiver may detect the difference between internal and external radio signal levels and determine the container to have been opened if the difference is less than a preset threshold. The receiver unit may be arranged to capture the FM frequency spectrum pertaining when the opening occurred and store it for later comparison with known FM frequency spectra of various cities to identify the location of the enclosure when opening occurred.
CA 2239928 1997-06-09 1998-06-08 Apparatus for monitoring opening of sealed containers Expired - Fee Related CA2239928C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CA 2239928 CA2239928C (en) 1997-06-09 1998-06-08 Apparatus for monitoring opening of sealed containers

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CA002207371A CA2207371A1 (en) 1997-06-09 1997-06-09 Apparatus for monitoring opening of sealed containers
CA2,207,371 1997-06-09
CA 2239928 CA2239928C (en) 1997-06-09 1998-06-08 Apparatus for monitoring opening of sealed containers

Publications (2)

Publication Number Publication Date
CA2239928A1 true CA2239928A1 (en) 1998-12-09
CA2239928C CA2239928C (en) 2008-01-22

Family

ID=25679412

Family Applications (1)

Application Number Title Priority Date Filing Date
CA 2239928 Expired - Fee Related CA2239928C (en) 1997-06-09 1998-06-08 Apparatus for monitoring opening of sealed containers

Country Status (1)

Country Link
CA (1) CA2239928C (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004093024A1 (en) * 2003-04-18 2004-10-28 Savi Technology Inc. Method and apparatus for detecting unauthorized intrusion into a container
IT201900004303A1 (en) * 2019-03-25 2020-09-25 Vodafone Automotive S P A VEHICLE COMPARTMENT MONITORING DEVICE, SYSTEM AND ASSOCIATED METHOD
EP4042148A4 (en) * 2019-10-08 2023-11-15 GSI Electronique Inc Electromagnetic detection and localization of storage bin hazards and human entry

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004093024A1 (en) * 2003-04-18 2004-10-28 Savi Technology Inc. Method and apparatus for detecting unauthorized intrusion into a container
US7259669B2 (en) 2003-04-18 2007-08-21 Savi Technology, Inc. Method and apparatus for detecting unauthorized intrusion into a container
IT201900004303A1 (en) * 2019-03-25 2020-09-25 Vodafone Automotive S P A VEHICLE COMPARTMENT MONITORING DEVICE, SYSTEM AND ASSOCIATED METHOD
EP3715189A1 (en) * 2019-03-25 2020-09-30 Vodafone Automotive S.p.A. Vehicle compartment monitoring device, system and associated method
EP4042148A4 (en) * 2019-10-08 2023-11-15 GSI Electronique Inc Electromagnetic detection and localization of storage bin hazards and human entry

Also Published As

Publication number Publication date
CA2239928C (en) 2008-01-22

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Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed

Effective date: 20180608