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LaserGrab PLS 180 obstacle scanner
The scanner is in the blue box at left corner. The laser radar is scanned just over the rail top over 180 degree in angle. Distance and angle is measured . In an empty situation the system is calibrated so the laser radar data are stored in the fail safe PLC system. When there is an obstacle or person in the area there is always something closer in range than the stored readings. By the distance and angle the size can be calculated. Time can filter away things flying in the air and left is static or slower moving obstacles like persons or larger obstacles. This activated an alarm output based on fail safe technology. PLS 180 laser radar system fulfills rail road safety demands in most countries and related EN norms. The system is fail safet to class 4 level of rail road safety classification
Artist impression of a 180 degree scanner sensing the area over the rail a way station
Features of LaserGrab platform laser radar system model PLS 180
  • Non contact method and independent of materials of obstacles
  • No cables or sensors in the ground makes installation very easy
  • No reflex and beam size problems like radar systems and ultrasonics
  • Good operation in rain and snow by smart detection technology
  • Infrared laser scanner with very high pin point accuracy
  • 180 degree field of view of the laser radar scanned area
  • Range up to 100 meter out door and in door operation
  • Can see a laying person between the rails at long distance
  • Fail safe system option fulfilling rail road signal standard demands. Class 4 fail safe level.
  • Optional built in camera with outputs for wireless image to locomotive
  • Very little maintenance and service
  • Design life time over 10-20 years
LaserGrab Platform Ladar PLS 180 is an obstacle detection system designed to see people walking or laying in rail track areas near stations or anywhere else. The unique characteristics only possible to get by a laser radar design makes it possible to pin point out the small surface of a person laying between the rails at long distance. PLS 180 is a similar design to the other LaserGrab system made form obstacle detection in rail road crossings and the PLS 60 system with smaller scanned area. PLS 180 can see pedestrians as well as other obstacles threwed down on the rail by hooligans. This technology is the only available system based on optics which is fail safe according to rail road regulations and demands. Radar and inductive systems have not been able to fully meet the hard requirements by rail road authorities. They can never be fail safe.

Technical specifications of Laser Grab PLS 180 laser radar systems

  • Laser safety class Class 1
  • Wavelength 905 nm in the near IR wavelength area
  • Max range of laser distance meter 200 meters but application recommends less than 100 meters
  • Beam diameter at exit is 20 mm and at 100 meters distance 35 cm
  • Minimum size of detectable object at 100 meters distance and at a light gray surface is 150x150 mm
  • Measurement speed of laser distance meter unit 5000 Hz while scanned in one axis
  • Scanning angle is 180 degree
  • Scanning speed 2 Hz
  • Scanner based on an oscillating mirror design with very long service intervals
  • Response time to see a person or obstacle is less 1 sec
  • Dimensions 350x650x150 mm in a steel cabinet. Sheet thickness 2 mm
  • Encapsulation IP 62 and weight of complete system is about 16 kg
  • Operating voltage 18-32 volt DC and power consumption is max 100 WA without heater
  • Power consumption of integrated heater is 100 W below 5-10 degrees C in ambient temperature
  • System is CE marked to highest level of RF noise for rail road environment

Sensor unit of Laser grab system

Links to related pages
LaseroptronixAB
E-mail: info@laseroptronix.se
Telephone 46-70 714 04 70
Enhagsslingan 23
 Web site www.laseroptronix.se
187 40 Täby
VAT nr SE 556 569 1135-01 Laseroptronix is an AB organisation
 Säte i Täby Kommun Glimmervägen 8 187 34 Täby / Sweden
Sweden North Europe
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 Created 2005-10-27 by Allan Jansson

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