Fiber optic intruder alarm system

Details Fiber optic intruder alarm system Fiber optic intruder alarm system

1979-03-26

1981-10-27

Swann, III, Glen R.

Communications: electrical

Condition responsive indicating system

Specific condition

250227, 340565, 340566, 340666, 350 962, G08B 1322, G08B 1310

Patent

active

042976847

ABSTRACT:
An intruder alarm for protecting the perimeter of an area utilizes a multimode optic fiber as the deformable sensing element, wherein a length of multimode optic fiber is buried in the ground of an area or perimeter to be protected. As coherent light from a laser is directed through a length of optic fiber, the output light pattern therefrom is speckled. When a deformation of the fiber occurs, even a small amount, the speckle pattern changes and is detected electronically indicating that a disturbance has taken place.

REFERENCES:
patent: 3258762 (1966-06-01), Donner
patent: 3394976 (1968-07-01), Hawkins
patent: 3940608 (1976-02-01), Kissinger et al.
patent: 4078432 (1978-03-01), Stewart
patent: 4095872 (1978-06-01), Stieff et al.
patent: 4106849 (1978-08-01), Stieff

Affiliated with

Also associated with

Rating

Fiber optic intruder alarm system does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Fiber optic intruder alarm system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Fiber optic intruder alarm system will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-282031