GTM has gone one further on the way to the precise measuring of torque and efficiency in wind power plant test rigs:
GTM offers a number of multi-component systems for structural durability of axle components, vehicle components, chassis, and wheels, which are matched specifically to the requirements of the relevant test bench.
Because of their area of application, the multi-component systems for the operational strength tests are referred to as wheel load sensors, whereby the terms ‘wheel force transducer’ and 'wheel force sensor' are also widely used. Loads are applied during travel via the contact surface of the tyre on the road. Great forces and torques can be applied to the chassis via the wheel.
The original loads are mainly the vertical and lateral forces on the wheel due to the weight of the vehicle, lateral forces in curves, and last but not least brake forces. Intelligent test benches help to cost-effectively prove the operational stability of chassis components. These test benches need durable wheel load sensors to verify the applied forces with high precision.
GMT wheel load sensors are multi-component systems that measure the applied force vector. In static determinacy, this occurs via three two-component transducers, as the mathematical minimum requirement for a complete force vector description is six channels according to theory. An increase of the number of channels and with it a deviation from determinacy, may offer certain advantages in these cases if preferential directions or main load directions are presented. It is therefore advisable to select the best possible number of channels for the relevant application. For the user, however, the original number of channels is of less importance, as the input signals are converted by way of matrix operations in the measuring amplifier system MCMpro to forces and torques in the Cartesian system.
Of more importance to the user is the adjustment of the wheel load sensors to the relevant brake space and the load input parts of the test bench. Adaptations to all popular hub hole diameters are generally possible without any problem.
In terms of material selection, the wheel load sensors can be produced as light-weight versions from e.g. high-strength aluminium alloy, or from salt spray-resistant stainless steel for use in extreme climatic conditions.
In addition to operational stability tests for axles and chassis, wheel load sensors are also suitable for use in test benches for the verification of operational stability of wheels. Versions for biaxial wheel test benches (ZWARP) or brake disk test benches (BSP) are suitable for various operational load stress fatigue tests for limousines or all-terrain vehicles.
The wheel load sensors themselves are designed for durability in terms of operational stability, which is many times that of a vehicle wheel.
The wheel load sensors are calibrated at GTM's own calibration lab for multi-component force and torque. The accreditation in accordance with DIN EN ISO 17025 guarantees traceability to national standards.