Sea Technology

DEC 2013

The industry's recognized authority for design, engineering and application of equipment and services in the global ocean community

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Page 35 of 83

The system's hardware comprises the AC power supply, switch power supply unit, main control board, stepper motor, valve position sensor, XBT data-receiving unit, Ethernet communication modules and other accessories. The system self-test, status display, motor control, motor position detection, display terminal interaction and data communication are mainly completed by the data acquisition and control board. The signal transmitted from the XBT probe is modulated and amplifed by the XBT data receiver unit. The digital data can be obtained by using an A/D converter, processed and stored by the microprocessor. The measurement results are transmitted to the data processor via the serial port. The XBT probes are released by the main control panel, with the control instructions sent by the data processor via an RS-485 cable. Meanwhile, the real-time temperature data and GPS message are sent to the data processor with RS-422 and RS-232 cables. In general, there are at least three kinds of communication cables. To reduce the amount of cabling and improve communication reliability, the serial port server of NPort IA5000A produced by Moxa (Brea, California) is used, which can convert three serial ports to the Ethernet interface that connects with the data processor. The server can protect the system from electrical noise or voltage changes with surge protection technology. (Top) A sailor installing the probes. (Bottom) Software interface for control and acquisition. control instructions, process the data acquisition feedback information, receive GPS data, and acquire and plot water temperature data. Data communication with the remote data center can also be done with the Ethernet interface. 36 st / December 2013 Technical Characteristics The system can be installed on any ship, including a variety of survey vessels and voluntary observing ships. The system power supply voltage is 220 volts AC, and power consumption is less than 100 watts. The system is compatible with the XBT probes produced by the National Ocean Technology Center of China and the T7 probes produced by Tsurumi-Seiki Co. Ltd. (Yokohama, Japan). Six XBT probes can be controlled sequentially for launch, and each probe can be shot or shut down by the user. If one probe fails, the others are not affected, and the operation can continue. Working mode options are manual launch and automatic launch. Automatic launching can be programmed ac-

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