Hydraulic steel structures
Hydraulic steel structures

Position feedback for civil engineering hydraulics

Constantly expanding infrastructure, means increasing use of hydraulics to position, move, and control, locks, gates, and even bridges. Heavy duty Micropulse linear position sensors provide accurate, reliable position feedback in these hydraulic systems.

Application examples

  • Detecting rake cleaner end positions

    Smooth operation of hydroelectric power plants

    The solution

    Floating debris at the infeed end of hydroelectric power plants impairs the performance and efficiency of the plant. The worst-case scenario could result in costly downtime. Balluff BHS pressure-rated inductive sensors reliably detect the rake cleaner end positions and act as a safety and protection system for hydropower plants.

    The features

    • High pressure rating
    • Easy to install
    • For all cylinder types from M5 to M18
    Detecting rake cleaner end positions in hydropower plants
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  • Controlling dam and weir gates

    Reliable and precise control on dams

    The solution

    The requirements for a dam go much further than just opening and closing the gate. Fish ladders must be taken into account and the fully automatic control of the water level must be ensured. Balluff BSI inclination sensors reliably and precisely measure the intermediate position of the gate. The sensors with metal housing and a wide temperature tolerance range are specifically designed for use outdoors.

    The features

    • Absolute angle tracing for exact positioning
    • Wide temperature range for outdoor use
    • Ideal for rough environments: Metal housing and high degree of protection
    Reliable and precise control on dams
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  • Opening and closing the locks gates

    Accurate, precise position feedback on lock gate hydraulics

    The solution

    Balluff Micropulse ProCompact magnetostrictive linear position sensors are used in the hydraulic cylinders that control the opening and closing of the lock gates. The hermetically-sealed, IP69K-rated enclosure protects against environmental hazards, and ensures long-term, reliable performance.

    The features

    • Stainless steel housing for use in coastal areas
    • With a cable guard system, can also be temporarily used under water
    • Non-contact operating principle ensures trouble-free performance
    Reliable and precise control of locks
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  • Lifting and lowering drawbridges

    Efficient control of movable bridges to keep traffic flowing

    The solution

    Time is of the essence when raising and lowering movable drawbridges, as impact on traffic must be kept to a minimum. Our high-precision Micropulse magnetostrictive linear position sensors, which are integrated in the hydraulic cylinders, allow the bridge to raised and lowered as quickly as possible. Our pressure-rated inductive sensors reliably detect the end positions of the cylinder and position the bridge with precision.

    The features

    • Position detection and speed measurement
    • High-pressure resistant rated to 500 bar
    • Cost-effective solution for monitoring end positions
    Lifting and lowering movable bridges
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  • Positioning bridges weighing multiple tons

    Exact positioning with heavy-duty cylinders

    The solution

    When building bridges, special heavy-duty cylinders carry out horizontal feed and vertical lifting motions to move the bridge elements, which weigh several tons. The synchronous positioning with millimeter precision of bridge elements weighing several tons is undertaken by our BTL rod CD magnetostrictive linear position sensor, which is installed in the pressure range of heavy-duty and high-pressure cylinders.

    The features

    • For pressures up to 1000 bar
    • Resolution down to 1 µm for synchronous positioning with millimeter precision
    • Ex area zone 2; non-incendive "nA"
    Positioning bridges weighing multiple tons
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    Have any questions? Please give us a call or send us an email. We look forward to hearing from you.