ALS is an enhanced (longer detection range, higher reliability, etc.) version of the LGS. The LGS has successfully passed Field Tests by the USA Air Force, and has already been installed in some major sensitive sites within the USA Navy, USA Department of Energy etc.
ALS A is currently out of line.
ALS B was redesigned to be a "green" product.
ALS B1 enhanced capabilities in heavy rains.

Please open ALS brochure

Principle of Operation

The ALS incorporates two Laser Range Finders (LRF) assembled in a sealed housing. Both LRF rotate on a common axis.

While rotating the LRF transmits laser pulses at a rate of 6000 p/sec. The return pulses are detected by the LRF. The ALS processes the data and creates a virtual map of the protected area by measuring the distance from the LRF to all the surrounding objects in a range of about 150 - 200 m (R1 and R2) see drawing “Principle of Operation” above.

During the detailed process the ALS “learns” the position of all existing objects and calculates the basic statistics to create the map, it takes approximately eight (8) scans to accomplish this task. This is an ongoing process, and it continues, as the algorithm updates the map and adapts it for changes due to rain, wind (moving bushes), etc. Once an intruder enters (walks, runs or crawls) the protected area the system knows to recognize that it is a meaningful change and transmits an alarm message to the Control Center .

A host PC computer receives this message, recalculates the intruder's coordinates and aims a PTZ camera to the intruder’s path. While the intruder is within the detection zone, a PTZ camera will automatically track him.

All alarm data (location and images) is stored in the PC, and can be sorted by time, events, etc.

Applications of ALS