TNS Asia Pacific Pte Ltd

Overview

Storms and heavy rain can inflict significant damage to homes and property. In Thailand, the government wished to establish a national rainfall monitoring system to improve its ability to predict storm movement and make the appropriate public announcements.

As a large number of rain gauges needed to be installed all over the Thailand, GPRS was used as the primary communication medium as it provided better coverage at a lower cost. Each monitoring station required a local storage system in case there was a communications failure. The I/O server that collected data from the rain gauge needed to be reliable and able to exchange data with the main controller.

Solution

At each monitoring station, MOXA ioLogik E2210 I/O server was used to receive data from the rain gauge. MOXA UC-7112 embedded computer was used for local data storage and MOXA OnCell G2150I GPRS/GSM modem was used to send data to the central management system.

With MOXA ioLogik E2210, automatic messages can be sent to a network host when an attached sensor changes status. Compared to traditional sensor polling methods, this proactive approach is easier to implement and provides more efficient communication between the host and I/O server.

The UC-7112 no longer has to use precious CPU resources on polling the I/O server, since the ioLogik actively reports changes in sensor status. For local data storage, the UC-7112's onboard memory can be expanded using its SD slot.

MOXA OnCell G2150I provided each station with a reliable connection to the Internet over GPRS network and allowed sent SMS for short message alarms.

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