Today we present an exciting customer project, which was realized together with our partner Elbe Group. A well-known manufacturer from the motorcycle industry gave us the task of equipping cardan shafts with torque sensors for test series and development trials in order to determine the damping properties in motorcycle cardan shafts.
Typical characteristics and challenges of the cardan shaft
The cardan shaft is a durable and extremely maintenance-friendly drive concept in which power is transmitted to the rear wheel via the cardan shaft. The particular challenge here is a damping element, which naturally has a major influence on the dynamic torques. A vulcanization process is used to apply an elastic intermediate layer between the larger outer tube and the smaller inner tube. This was followed by the assembly of the universal joint.
Live measurement data and evaluation thanks to integrated sensor
In order to provide the user with as much valuable information as possible and to be able to examine the cardan shaft for its limitations, strain gauges were applied to both sides of the rubber element and connected to our miniaturized Bluetooth measuring amplifier coreLIME which is placed inside the tube.
The energy supply is ensured via a rechargeable battery and exceeds the requirements set. Well over 2,000 operating hours can be covered with one charge. The generated measurement data can be logged on the measurement amplifier, viewed and recorded live in the mobile application and fed into a variety of systems via the appropriate gateway from core sensing, e.g. 0 - 5 V, 0 -10 V, 4 - 20 mA, USB-C, CAN bus, RS-232 or directly via mobile data to the cloud.
Key Facts:
- Sampling rate: 500 Hz
- Integrated speed measurement
- 3-axis acceleration up to 30 g
- Integrated temperature measurement
- Energy efficient battery operation
- Bluetooth wireless data transmission
- Factory calibration,
- Measurement deviation < 2 %
