Classifications

• • G—PHYSICS
  • G08—SIGNALLING
  • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
  • G08B29/00—Checking or monitoring of signalling or alarm systems; Prevention or correction of operating errors, e.g. preventing unauthorised operation
  • G08B29/18—Prevention or correction of operating errors
  • G08B29/183—Single detectors using dual technologies
• • G—PHYSICS
  • G01—MEASURING; TESTING
  • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
  • G01S15/00—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems
  • G01S15/02—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems using reflection of acoustic waves
  • G01S15/50—Systems of measurement, based on relative movement of the target
  • G01S15/52—Discriminating between fixed and moving objects or between objects moving at different speeds
  • G01S15/523—Discriminating between fixed and moving objects or between objects moving at different speeds for presence detection
• • G—PHYSICS
  • G08—SIGNALLING
  • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
  • G08B13/00—Burglar, theft or intruder alarms
  • G08B13/16—Actuation by interference with mechanical vibrations in air or other fluid
  • G08B13/1609—Actuation by interference with mechanical vibrations in air or other fluid using active vibration detection systems
  • G08B13/1645—Actuation by interference with mechanical vibrations in air or other fluid using active vibration detection systems using ultrasonic detection means and other detection means, e.g. microwave or infrared radiation
• • 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
  • G08B13/2494—Intrusion detection systems, i.e. where the body of an intruder causes the interference with the electromagnetic field by interference with electro-magnetic field distribution combined with other electrical sensor means, e.g. microwave detectors combined with other sensor means

Landscapes

• Physics & Mathematics (AREA)
• General Physics & Mathematics (AREA)
• Engineering & Computer Science (AREA)
• Radar, Positioning & Navigation (AREA)
• Remote Sensing (AREA)
• Electromagnetism (AREA)
• Toxicology (AREA)
• General Health & Medical Sciences (AREA)
• Acoustics & Sound (AREA)
• Health & Medical Sciences (AREA)
• Computer Networks & Wireless Communication (AREA)
• Computer Security & Cryptography (AREA)
• Burglar Alarm Systems (AREA)
• Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
• Catching Or Destruction (AREA)

Applications Claiming Priority (1)

Publications (1)

Family

ID=5986375

Family Applications (1)

Country Status (7)

Families Citing this family (3)

• 1976
  • 1976-08-25 DE DE2638337A patent/DE2638337B1/en active Granted
• 1977
  • 1977-07-01 CH CH810077A patent/CH618280A5/en not_active IP Right Cessation
  • 1977-08-22 FR FR7725567A patent/FR2363116A1/en active Granted
  • 1977-08-22 AT AT0606777A patent/AT363825B/en not_active IP Right Cessation
  • 1977-08-24 SE SE7709518A patent/SE414239B/en unknown
  • 1977-08-24 NL NL7709344A patent/NL7709344A/en not_active Application Discontinuation
  • 1977-08-24 GB GB35420/77A patent/GB1582018A/en not_active Expired

Also Published As

Similar Documents

Legal Events