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原文传递 USING DEVICE-SPECIFIC DATA ACQUISITION FOR AUTOMATED LABORATORY TESTING.

题名：	USING DEVICE-SPECIFIC DATA ACQUISITION FOR AUTOMATED LABORATORY TESTING.
作者：	Sheahan-TC; DeGroot-DJ; Germaine-JT
关键词：	DEVICE-SPECIFIC-DATA-ACQUISITION; AUTOMATION-; LABORATORY-TESTS; GEOTECHNICAL-LABORATORIES; FEEDBACK-; SERVO-CONTROL; ALGORITHMS-; SOFTWARE-
摘要：	Computer-based data acquisition systems are becoming common equipment in the geotechnical laboratory. Although centralized, laboratory-wide systems offer increased data accountability, flexibility, and access control, their high costs can be justified only in large laboratories and they are not suited for use in feedback control of computer-automated equipment. A device-specific data acquisition system is dedicated to a single testing apparatus and thus allows smaller laboratories to incorporate a data acquisition capability one device at a time. From a comparison of the two system types, it is concluded that only the device-specific approach is appropriate for use in computer-automated, feedback-based servo control of testing devices. Additional requirements for device servo control are described, including servo control algorithms (proportional and proportional plus integral plus derivative) and other software requirements for control based on device-specific data acquisition systems. Experiences in applying these basic principles to the computer automation of a number of different geotechnical laboratory devices are described. Data from various tests are provided to illustrate the automated test control quality. Improved technology and lower costs for data acquisition hardware and computers have made device-specific systems an economical solution for obtaining high-quality test data.
总页数：	Transportation Research Record. 1994. (1432) pp9-17 (7 Fig., 2 Tab., 12 Ref.)
报告类型：	科技报告