Table 2 lists the specifications of sensor interface boards.Thecollected data were transferred to the external computer throughEthernet and stored to the hard disk drive.The structure of the sensing data storage system (SDSS) isshown in Fig.3, including all 24 sensors, 3 in-machine videocameras, and the sensing data storage unit (SDSU) with its20 interface boards.Atthe study stage of sensing technologies, sensing data oughttobe stored without being processed, since data mining technologycan readily analyze enormous volumes of raw data.The processing algorithm emerging from such studies will beinstalled in the interface board.The interface board will be smallerand be installed close to sensors to execute the algorithm foroptimum cutting or failure prognosis
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