The system's pressure is negative, and the membrane maintains contact with the touch screen. Any time the user wishes to use the device, the internal pressure must be increased slightly to a very small - and specific - positive pressure. Therefore, more CO2 or air is used to pressure balance the interior of the system against the ambient water pressure. This action protects the device from crushing during a descent by limiting the differential pressure between the ambient and internal pressure. This differential pressure is maintained in a negative range of a few psi, and it keeps the device safe. During a descent, the device is not usable, but the balance module continually balances pressures. The iDive functions with either liquid CO2 cartridges (~800 psi gaseous CO2) or with first stage regulator air pressure (~100 psi) as the input. A unique pressure balancing mechanism, called the balance module, passively uses the input (from the CO2 or air) in direct proportion to the ambient water pressure. The deeper the iDive system goes, the higher the ambient water pressure. Additionally, the housing includes a pressure management system to allow the critical function of bleeding air during ascents. As an important design component, the membrane and touch screen must have a physical gap of air between them to allow finger contact to be recognized underwater. Next, and more challenging, developers had to create a flexible membrane/pressure balancing system to allow users to interface with the touch screen. The first requirement was met with a waterproof housing designed to safely operate in extreme pressures. To successfully use a touch screen device underwater, iDive developers had to 1) keep the device dry and 2) ensure users could interface with it at various water depths. This application is one way innovative companies are bringing marine science into the 21 st century. This product, developed in collaboration between Watershot and Inova Design, Inc., uses Smart Products' Model #132 Side Seal as pressure relief valves within the system's balance module. Pêches et Océans Canada / Gouvernement du Canadaĭominique.Bureau at dfo-mpo.gc.ca / Nouveau Tél.Divers can now record data without having to leave their underwater office with the new iDive iPad Housing device. Marine Invertebrate Biologist, Marine Ecosystems and Aquaculture Division (MEAD), Science,įisheries and Oceans Canada / Government of Canadaĭominique.Bureau at dfo-mpo.gc.ca / NEW Tel.: 25 / FAX: 25īiologiste des Invertébrés Marins, Division des Écosystèmes Marins et de l'Aquaculture, Sciences I will attempt to post updates if/when we develop a system that works for us as it could be of interest to many people here. With the release of the iDive housing ( ) it looks like collection of data directly to a tablet is now an option underwater.ġ- Does anyone have any experience using the iDive Housing / iPad for scientific data collection underwater and what has your experience been?Ģ- Can anyone recommend Apps where custom forms for data collection can be created? App should also provide easy export of data.ģ- Does anyone know of other underwater electronic data collection options for divers? We are interested in options to go paper-less through electronic data collection. This generates a large volume of data that must later be entered in a computer at considerable expense. To date we have been using underwater paper forms to collect our data. The program I work in conducts marine invertebrate dive surveys for a number of species (sea cucumbers, sea urchins, geoduck clams, habitat mapping) mostly for stock assessment purposes. Next message: Use of iDive housing / iPad for underwater data collection.Previous message: Some Current Coral Bleaching Research: AOML and its Partners.Use of iDive housing / iPad for underwater data collection Bureau, Dominique Dominique.Bureau at dfo-mpo.gc.ca Use of iDive housing / iPad for underwater data collection
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