Page 22: of Marine Technology Magazine (Apr/May 2011)

Worldwide Internet Based Data Acquisition from

Remote Platforms

The need for remote controlled environmental sensors in aquatic environments is accelerating. The growing busi- ness of intensive fishfarming in large scale pens, as well as the increased need for continued environmental monitor- ing of standard variables has made it necessary to focus on the development of reliable, flexible and automatic con- trol of the monitoring systems.

The Norwegain company SAIV has specialized in design and production of innovative marine/aquatic sensors and data acquisition systems. Their best known products are the STD/CTD probes model SD204 and a family of high accuracy water level/pressure sensors.

Recently SAIV started to use a new low power, fast web server on data acquisition systems in order to communi- cate data worldwide between remote instrument plat- forms and their users using the hypertext transport proto- col ”http”. This report describes the use of and experiences with the http - protocol in two actual data acquisition projects: A tidal measurement system for the Faeroe

Islands authorities and an intelligent fish welfare monitor- ing system for the Norwegian aquaculture industry.

Background

Traditional data communication systems for data 22 MTR April 2011

A novel concept for using a low power web server integrated in a data acquisition platform for transferring data using “http” was developed by SAIV. The data is directly transferred from a field station to the end user without any intermediate links via the Global System for Mobile Communications (GSM).

By Bard Sagstad, SAIV AS & Trygve Gytre, Institute of Marine Reseach

Web server with dynamic

HTTP using GRPS router to the WWW: Many users can connect at any time with- out interrupting measuring sequence at the platform.