More orders for Arck – June 2008

France-based Arck Sensor is understood to have another order…


Press release in WORLDCARGO NEWS – June 2008

France-based Arck Sensor is understood to have another order for its Sirrah and Spica sensors from Yaskawa Siemens, in connection with a crane control system being engineered for an automated, rail-mounted stacking crane in a Chinese port. Spica is an optical sensor with infra-red detectors that measures position of the container edge to ensure accurate stacking. One detector is installed at each corner of the spreader and they and the central calculator, which is connected to the main PLC, are protected from shock damage and vibrations in a special steel housing with rubber silent blocks. The Sirrah sensors are used to evaluate beacon angles and measure sway and skew. Normally they are positioned downwards on the trolley while the beacon faces upwards on the spreader. The sensors are connected to the PLC through an RS422 serial interface or a Profibus interface, and they can be designed to measure the beacon’s angular speed as well as the alignment. Details of the new order are not known, but Arck is known to have been working on a tandem spreader application, also believed to have been for a yard crane. In this case the tandems are fitted with six sensors, one on each of the outer corners and one at the same end of each spreader.