This paper introduces a data processing system for the three-dimensional information of double parallel-joint coordinate
measuring machine (PD-CMM).The intelligent sensor units, which consisted of angle sensors, temperature sensors,
microcontroller, are set in each joint and arm. The data are mainly the grating's output signal of each joint and the
temperature change of each arm. The system samples and processes the data, then communicates with the host computer
through USB interface. The simulation and experiments show that the data processing system works well.
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