Abstract:

With the development of Shipbuilding industry,especially the continuous increasing of microcomputer-based control technology,various kinds of smart sensors are widely used in ship surveillance.The paper proposes a design of pump room signal conversion circuit which transforms the pressure values of marine pump coming from pressure sensor to the controller chip LPC2294.The packaged data are sent to Ethernet via the Ethernet controller.The paper introduces the hardware and software design in detail and verifies the effectiveness of the circuit by experiment.The design presents good performance of early warning about marine pump's abnormal condition,and meets the requirement of mariner surveillance in long distance.

Key words: signal conversion;TCP IP protocols;μC OS II;LPC2294;DM9000E