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• 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 ultrasonic
• Good operation in rain and snow by smart detection technology
• Infrared laser scanner with very high pin point accuracy
• 60 to 90 degree field of view of the laser radar scanned area
• Range up to 500 meter out door and in door operation
• Very little maintenance and service
• Design life time over 10-20 years
• Difficult of fool and avoid.
• Real 3D measuring makes system efficient

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 LaserGrab PLS 60 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 adjustable to 60 degree.
• Scanning speed min 2 Hz Max 20 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

Ladar scanner unit for 3 D sensing

The scanner is in the blue box at left corner. The laser radar is scanned just over the rail top over 60 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. This system fulfills rail road safety demands in most countries and related EN norms. System is fail safe to level 4.

Links to related pages

• PLS180 laser radar with 180 degree scanning angle and similar characteristics like this system
• LP 300 series of laser perimeters which can detect obstacle along a line from a single point. Laser distance meter based unit.
• Rail road applications by systems from Laseroptronix
• Harbor application for laser radar scanner system. Artist view. PDF file