3D Force Sensors

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Construction of 3D force sensors

With the 3D force sensors from ME-Meßsysteme GmbH, it is possible to measure forces in three spatial directions (x, y, z). The 3D sensors are equipped with full-bridge strain gauges. The signals from the full-bridge strain gauges each correspond to a force component in the x, y, and z directions.

Spring joint guide

The deformation body of the 3D force sensor is designed to have a spring-joint guide equipped with strain gauges in three mutually perpendicular orientations. The spring-joint guides and the arrangement and interconnection of the strain gauges enable a vector decomposition of the applied force vector across the three axes of the force sensor.

Vector decomposition is therefore achieved mechanically, through three orthogonally arranged spring-link guides, and additionally through the arrangement of strain gauges in the Wheatstone bridge, so that residual transverse forces and moments are also compensated electrically/circuit-wise. 3D force sensors based on this principle are superior to designs consisting, for example, of 1D force sensors with separate ball or sliding linear guides.

3D Force Sensor K3D40

The K3D40 3D force sensor features three "double beams" mounted in series. The double beam is a parallelogram guide realized with flexure joints.

Compact dimensions, maximum rigidity, and robustness are achieved by milling the individual sensor elements from a single piece, eliminating the need for separate assembly.

The design is copied worldwide; the original comes from ME-Meßsysteme.

The K3D40 and K3D35 sensors are constructed in an "open" series connection of double beams. In this "line" design, each measuring axis is mounted at the end of the preceding measuring axis. Therefore, this design is only suitable for smaller forces, up to approximately 100 N.

K3D60a

The K3D60a 3D force sensor, like the K3D40, is a series-connected sensor. The closed "box" design gives the sensor greater rigidity compared to an open "line" design.

ME-Meßsysteme GmbH offers a wide range of sensors in this design, from 10 N to 500 kN.

K3A155

A frequently used design for 3D sensors – but also for 6D force/torque sensors – is the 4-column design. By varying the length and cross-sectional area of the columns and by varying the sensor diameter, stiffness and thus the measuring range can be adapted for different load cases.

The deformable body exhibits different stiffnesses in each direction. The distribution of the force vector into the force components in the x-, y-, and z-directions and the compensation of moments and transverse forces are achieved electrically through the arrangement of the strain gauges.

3D Force Sensor Development

ME-Meßsysteme has set benchmarks and standards in the development and application of 3D force sensors. From individual units for test vehicles to series applications, we support you in the development and production of 3D force sensors.

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