A long term on-line data acquisition system for endurance machines was developed at Claas R&D. It was used on a combine harvester during the 1999 harvest. The system was designed to record parameters such as, torque, speed, strain, temperature, power requirement, etc. System requirements were defined and turned/assembled into a modular hardware architecture. The data then could be either processed in real-time or downloaded and displayed as a Gaussian distribution based on a resistance time classification method. Within system realisation it was found that various components available in the market required further modification. For example the telemetry hub used to measure torque and speed was modified in order to work reliably within the agricultural field environment. There will be further developments based upon the experience of using the system for a thousand hours in the US harvest of 1999. Future evolvement will include remote access to the system via radio link for downloading and programming of such a device on Clans endurance machines.
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