Sensor technology for crane safety systems

August 4th, 2014, Published in Articles: EngineerIT


mecosa-aug-2014At this year’s SPS/IPC/Drives exhibition, FSG focussed on measuring and sensor technology for crane systems which must fulfil high require-ments on precision and durability. Amongst other components, the com-pany presented live ring encoders with a spring-loaded external gear wheel that serve to detect the swing angle and speed of telescopic crane booms. The robust multi-turn live ring encoders can be connected to the gear rim of the boom drive to register its rotations. They are IP68 protected and withstand even rugged environments. For load calculations, FSG presents linear transmitters that detect load-dependent displace-ment in spring arms. These devices are available as potentiometric or inductive models. Wind warning systems consisting of an anemometer and an indicator ensure safety and enable monitoring in cranes and excavators. They detect wind speeds up to 50 m/s. The indicator contains an electronic LED circular bar graph display with a maximum limit value contact which can be adjusted from the outside. If the maximum value is exceeded, the potential-free contact is switched. The sensors for crane systems are available with the following signal outputs or interfaces: 0…3.4 V DC speed signal, 4…20 mA, 4…20 mA intrinsically safe with ATEX certification, CANbus with CANopen protocol, and Profinet (optionally with Profisafe protocol).

Henning Springer, Mecosa, Tel 011 257-6100,


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