GB8526575D0 - Signal processing - Google Patents

Signal processing

Info

Publication number
GB8526575D0
GB8526575D0 GB858526575A GB8526575A GB8526575D0 GB 8526575 D0 GB8526575 D0 GB 8526575D0 GB 858526575 A GB858526575 A GB 858526575A GB 8526575 A GB8526575 A GB 8526575A GB 8526575 D0 GB8526575 D0 GB 8526575D0
Authority
GB
United Kingdom
Prior art keywords
signal processing
signal
processing
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
GB858526575A
Other versions
GB2182474B (en
GB2182474A (en
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.)
Shorrock Security Systems Ltd
Original Assignee
Shorrock Security Systems Ltd
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 Shorrock Security Systems Ltd filed Critical Shorrock Security Systems Ltd
Priority to GB8526575A priority Critical patent/GB2182474B/en
Publication of GB8526575D0 publication Critical patent/GB8526575D0/en
Publication of GB2182474A publication Critical patent/GB2182474A/en
Application granted granted Critical
Publication of GB2182474B publication Critical patent/GB2182474B/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • G08B13/2497—Intrusion detection systems, i.e. where the body of an intruder causes the interference with the electromagnetic field using transmission lines, e.g. cable

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Burglar Alarm Systems (AREA)
GB8526575A 1985-10-29 1985-10-29 Signal processing Expired GB2182474B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB8526575A GB2182474B (en) 1985-10-29 1985-10-29 Signal processing

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB8526575A GB2182474B (en) 1985-10-29 1985-10-29 Signal processing

Publications (3)

Publication Number Publication Date
GB8526575D0 true GB8526575D0 (en) 1985-12-04
GB2182474A GB2182474A (en) 1987-05-13
GB2182474B GB2182474B (en) 1989-09-20

Family

ID=10587380

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8526575A Expired GB2182474B (en) 1985-10-29 1985-10-29 Signal processing

Country Status (1)

Country Link
GB (1) GB2182474B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2165384C (en) * 1995-12-15 2008-04-01 Andre Gagnon Open transmission line intrusion detection system using frequency spectrum analysis

Also Published As

Publication number Publication date
GB2182474B (en) 1989-09-20
GB2182474A (en) 1987-05-13

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee
728C Application made for restoration (sect. 28/1977)
728A Order made restoring the patent (sect. 28/1977)
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19951029