|
|
 |
|
|
|
 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
- Products -> Wheel force transducer (WFT) for Two-Wheelers
The measuring wheel system ROLSmc has been designed to acquire operating loads as well as to carry out vehicle dynamics tests. It was developed especially for the conditions experienced by two-wheelers. For instance low power consumption as well as restricted space requirements were taken into account. With a supply voltage of 12V, the current consumption is only 0.4A. Besides the cable connecting to the vehicle battery and the data recorder ROLSmc does not require any additional external components. All control functions (angular offset, configuration, etc.) as well as the data output are conducted via the CAN interface.
The wheel loads are detected by five strain gauge based 3-component measuring elements, which are arranged around the hub in circumferential direction. The complete force flow is introduced through the tire to the rim ring. Two CFC-discs are connecting the rim ring with the sensor unit, which contains the 5 measuring elements. All electronic components are placed in a co-rotating housing, which is located in the wheel hub. The power supply and the data transfer takes place through a connector on the non rotating side.
The 15 bridge signals from the strain gauge measuring elements are amplified and digitally processed by the co-rotating electronics with an integrated powerful DSP. In this procedure wheel forces and wheel moments are calculated by means of calibration information and wheel geometry in physical units. The transformation into the non-rotating coordinate system is executed by using the angle of rotation determined via the signal from the integrated optical encoder. Output of the data with 16/24/32bit resolution takes place via a CAN interface. An additional line which can be operated in master or slave mode provides synchronization with further systems.
The ROLSmc-HD system has been optimized for vehicle dynamics studies. The mass moment of inertia around the wheel axle could be reduced to 55% of the ROLSmc standard wheel. The total weight of the construction is also reduced by around 25%. With ROLSmc-HD, driving dynamics investigations with maximum proximity to the series vehicle are possible.
>>Data sheet ROLSmc<<
>>Data sheet ROLSmc-HD<<