Case Study: Portable PC for Ocean and Coastal Surveying

Case Study: Portable PC for Ocean and Coastal Surveying

Portable Industrial PC Solution for Ocean and Coastal Surveying – all in a box !
A BVM Case Study

Introduction to the Customer

For over half a century, our customer has been at the forefront of pioneering technology for underwater exploration . Their unparalleled expertise spans the domains of offshore energy, maritime defence and ocean sciences – ensuring underwater work where navigation, positioning, communication, imaging and measuring, operational in any water depth for any duration – and from any operational platform – crewed or robotic, can be conducted safely and without risk.

Customer Requirements

As part of advancing their line-up of defence products, our client sought an innovative solution in the format a ruggedised Portable PC to oversee & control the operations of Remotely Operated Vehicles (ROVs) deployed in the challenging external conditions provided at sea. PC functionality was to remain consistently reliable within a temperature range spanning from -20°C to a scorching +50°C – and an absolute paramount need for waterproofing to high levels of (certified) ingress protection.

CAD Portable PC for Ocean and Coastal Surveying 2
CAD Portable PC for Ocean and Coastal Surveying 1

The Design

BVM provided a bespoke Portable PC solution housed in a light weight Pelicase  (PELI 1400) featuring a 7” capacitive projective touchscreen interface. Other central elements consisting of the design, included :

  • ARM iMX 7 Computer-on-module: providing the PC engine for the system, the iMX7 module brought both extensive computing power to suit current & future proofing needs with low power to keep heat dissipation to a minimum within the Pelicase – accompanied via a custom carrier PCB  to bring out specific waterproof i/o to the outside world in the format of :-
    • USB 1 x USB 2.0 Type A
    • Serial 1x Serial DB9 Connector
    • Sound : 1x Waterproof Speaker/Driver
    • Network : 2x Panel Mounted RJ45 Lan Connector
    • Power : 1x Panel mounted Power-In Connector
    • Transceiver Connection : 1x 8-way Transceiver connector
  • 7” projective touchscreen : 1000 Nit LED backlit TFT to provide complete clarity of information in extreme daylight conditions at sea – integrated with a projective capacitive touchscreen to provide control and emulation of modern-day smartphone & tablet devices to ensure a ‘familiar experience’ for user interactivity with the software application. 
  • GNSS Receiver: The inclusion of a Global Navigation Satellite System (GNSS) receiver to empower precise positioning & accuracy for the ROV, utilising TW1422 GPS/GNSS Antenna 
  • 12 & 24V DC Input: Ensuring adaptability to various power sources, the Portable PC was equipped to handle both 12V and 24V DC inputs.

Environmental Specification

  • Storage temperature: -30°C to +70°C
  • Operating temperature: -20°C to +55°C
  • Ingress protected to IP67 as standard in storage – with the lid closed
  • Ingress Protected to IP66 as standard during operation – with the lid open
  • Salt fog resistant
  • Height drop resistivity: 30”

Compliance Testing:

  • EMC testing standard:
    • BS EN 60945:2002 Emissions and Immunity
    • BS EN 61000-6-1:2019 (Immunity)
  • Regarding GNSS Receiver: (assuming pre-approved module being used)
    • EN 301 489-1 v2.2.0
    • EN 301 489-19 V2.1.1
    • EN 303 413 V1.1.1
  • Testing for CE Mark
  • IP66 lid open
  • IP67 lid closed
  • Salt fog
  • Storage temperature: -20°C to 60°C
  • Operating temperature: -20°C to 55°C
  • Drop Test: survive 30” drop
  • Vibration: (topside IEC 60945 section 8.7)
CAD Drawing

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