Control of Building Engineering Services. Part 3: A Proposal for a Distributed Data Acquisition and Control (D-DAC) System

摘要

The advent of the mini digital computer led to Centralized Control Systems which concentrated all information and supervision at a central point. It was soon found, however, that like the dinosaur the signal paths could become extremely long and were vulnerable to failure and breakage. The logical result was to place data and control concentrated locally at important points while still sending data back to a central information center. Thus a distributed or hierarchical data acquisition (measurement) and Control Systems evolved. Nowadays the emergence of the microprocessor has made it possible to conceive of even greater schemes of data acquisition and control and brought new problems. This paper studies the concepts of the topology of a Distributed microcomputer based Data Acquisition and Control (D-DAC) System.