CA1225715A - Systeme de detection de perturbations electromagnetiques - Google Patents

Systeme de detection de perturbations electromagnetiques

Info

Publication number
CA1225715A
CA1225715A CA000455555A CA455555A CA1225715A CA 1225715 A CA1225715 A CA 1225715A CA 000455555 A CA000455555 A CA 000455555A CA 455555 A CA455555 A CA 455555A CA 1225715 A CA1225715 A CA 1225715A
Authority
CA
Canada
Prior art keywords
signal
frequency
pass filter
detection
responder
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.)
Expired
Application number
CA000455555A
Other languages
English (en)
Inventor
Tallienco W.H. Fockens
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.)
Nederlandsche Apparatenfabriek NEDAP NV
Original Assignee
Nederlandsche Apparatenfabriek NEDAP NV
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 Nederlandsche Apparatenfabriek NEDAP NV filed Critical Nederlandsche Apparatenfabriek NEDAP NV
Priority to CA000455555A priority Critical patent/CA1225715A/fr
Application granted granted Critical
Publication of CA1225715A publication Critical patent/CA1225715A/fr
Expired legal-status Critical Current

Links

Landscapes

  • Radar Systems Or Details Thereof (AREA)
CA000455555A 1984-05-31 1984-05-31 Systeme de detection de perturbations electromagnetiques Expired CA1225715A (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CA000455555A CA1225715A (fr) 1984-05-31 1984-05-31 Systeme de detection de perturbations electromagnetiques

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA000455555A CA1225715A (fr) 1984-05-31 1984-05-31 Systeme de detection de perturbations electromagnetiques

Publications (1)

Publication Number Publication Date
CA1225715A true CA1225715A (fr) 1987-08-18

Family

ID=4127980

Family Applications (1)

Application Number Title Priority Date Filing Date
CA000455555A Expired CA1225715A (fr) 1984-05-31 1984-05-31 Systeme de detection de perturbations electromagnetiques

Country Status (1)

Country Link
CA (1) CA1225715A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109377610A (zh) * 2018-10-19 2019-02-22 天津市明星宇安防科技股份有限公司 防线圈盗开的智能门锁结构及智能门锁的防盗开方法

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109377610A (zh) * 2018-10-19 2019-02-22 天津市明星宇安防科技股份有限公司 防线圈盗开的智能门锁结构及智能门锁的防盗开方法

Similar Documents

Publication Publication Date Title
US4686517A (en) Field disturbance detection system
US4551712A (en) Electronic detection system for detecting a responder including a frequency divider
CA2168488C (fr) Appareil pour positionner une antenne de terminal terrien eloigne
EP0430469A2 (fr) Circuit de détection de la qualité de signaux pour récepteurs FM
US3909722A (en) Variable frequency communication system
US3863240A (en) Electromagnetic intrusion detection system
JPH0355052B2 (fr)
GB1406500A (en) Electronic security systems
KR100273879B1 (ko) 방송 수신기
US4371981A (en) Spectral squelch
US2524493A (en) Wave-signal responder system
US4609911A (en) Variable frequency RF electronic surveillance system
GB1505081A (en) System for the identification of a road vehicle travelling along a predetermined route
US3525045A (en) Apparatus for indicating tuning of frequency-modulated signal transmissions
EP0242901B1 (fr) Système de détection électromagnétique avec suppression de fausses alarmes
US3982243A (en) Device for transmission of information from an information emitter to an information seeker
US4672330A (en) Phase-lock loop systems
WO1995021431A1 (fr) Element d'alarme
AU7721981A (en) Dual frequency anti-theft system
US5304982A (en) Apparatus and method for detecting magnetic electronic article surveillance markers
RU2032223C1 (ru) Устройство охранной сигнализации для обнаружения метки
US2027022A (en) Fading elimination
EP0226239A1 (fr) Système de détection électromagnétique à sensibilité élevée
US4504973A (en) Automatic disabling of AFC/AFT controller during receiver circuit tuning
SU1520670A1 (ru) Устройство дл измерени пространственно-пол ризационных параметров радиосигналов

Legal Events

Date Code Title Description
MKEX Expiry