Position detection in hydraulic cylinders

Integrated position detection with the patented Draw Wire Encoder SX200

WayCon Positionsmesstechnik: The patented SX200 is one of the few Draw Wire Encoders that can be integrated into hydraulic cylinders and can measure a stroke of up to 12m. No other measurement principle reaches this measuring range without removing the cylinder, with a simultaneous integration of the measuring system.

Due to the way the hydraulic cylinder is assembled, the entire measuring system is optimally protected. The SX200 is remarkably suited to application in confined spaces. The measuring cable is connected to the piston and is pulled from the sensor during the operation of the cylinder. In the sensor itself, the measuring cable is coiled around a cable sheave, which rotates with each cylinder stroke, thereby turning the linear movement into a rotation. Through a sealed shaft (pressure implementation) the rotary movements are directed outwards into an unpressurized area and recorded by a sensor element (e.g. a digital absolute rotary encoder).

Through the evaluation of sensor signals, not only is the position of the piston rod regulated, but the specific cylinder positions are also recorded and the synchronic movement of multiple cylinders is ensured. The highly dynamic sensors also allow for rapid cylinder movements during this process. The compact casing, as well as adaptation to customer needs, qualify this sensor technology for multiple areas of application. Thanks to its robust construction and high quality, the sensor can be employed in harsh industrial environments.

Typical applications for the Draw Wire Encoder SX200 are: Hydraulic gates on dams; monitoring of simultaneously running cylinders; regulation and monitoring of traverse speed.

Background information
WayConPositionsmesstechnik GmbH has been developing and manufacturing precision sensors for position and distance measurement since 1999. As an innovative company with headquarters in Taufkirchen near Munich and a branch in Brühl near Cologne, we sell our products all over the world. Our goal is to provide our customers with the best possible measurement technique solution: from high-quality sensors from the standard range to customer-specific solutions, from prototype to series production – for the most varied applications in industry and research. The products made in Taufkirchen are subject to rigorous quality standards and every single one is delivered to our customers with a calibration certificate.