156B Week 3

Overview of Status of Analysis, Design, Fabrication, Tests, etc.

• • Waiting on wet mates ordered, will test when they arrive.

  • Need to prep testing materials, existing hardware from risk reduction

  • Need to look into mounting the camera

Accomplishments from Previous Week

• • Call made to Video Products Inc and information was gathered. No guarantees on underwater use, suggested marine epoxy to strengthen the seal or find another product.

  • Plastic, cheap wet mate has been ordered with a marine epoxy to seal it better......Vicki and Curtis

  • Call was made to Rossfelder and we found clarification of a few important items including the ballast weight recommended and a general intuition about the risks involved in the project....... Curtis

  • Design proposal presentation done...........................................................................All

  • Began writing the final report.....................................................................................All

  • Machined lid to the risk reduction housing to accept the plastic wetmate-.......................................... Curtis McCabe

  • Used scrap piece of Ethernet cable to test plastic wet mate at 60 psi for about 20 hours (overnight).Curtis McCabe

  • Test failed and this device will no be mass produced, so we will move onto purchase the subconn wet mate.

Goals for Next Week (list names after each item). Use specific and measurable objectives.

• • Prep risk reduction hardware for pressure testing with plastic wet mates..................Curtis McCabe

  • Finalize housing dimensions (depends on if we get picture size needed)...................Juan DeLeon

  • Design a mounting design for camera (also stabilizers if possible)............................Vicki Banh

  • Depth Analysis.....................................................................................................Jonathan Riestra

  • Check with sponsor and see if the housing is going to be mass produced or not-all

    • If yes, then test the more inexpensive wetmate connection

      • Need to machine shop the attachment of the wetmate to housing

      • Want to see if it can withstand 285.15 kPa

        • Place withing pressure chamber

      • Want to see if it is waterproof

        • Submerge into a pool and use a multimeter to check if it shorts

      • Test to see if epoxy or elastomer would be better and if it works in sealing the plastic wetmates

    • If not, then proceed with ordering the higher quality and more expensive wetmate

  • Add sections to the report and edit/add to previous sections

  • Look into stabilizer mounts

  • Design several mounting options

Sponsor Comments from Last Meeting and Actions Taken to Address these Comments (indicate date of comments and if via email or in person)

• • Sponsor asked for completed analysis on whether or not our proposed design will work. Curtis called Rossfelder to ask about driving a 3 inch diameter pipe into sediment. Rossfelder representative stated that the vibracore should be able to do it, but could not guarantee performance or offer a means to calculate the risk.

  • Start getting an idea of where everything is mounted

  • Look into Go Pro cameras.

    • Found that go pro cameras were not an option due to limited range of WiFi and USB connection (less than 60 ft)

Instructor Comments from Last Meeting and Actions Taken to Address these Comments (indicate date of comments and if via email or in person)

• • Look into whether or not f-stop is constant or not (4/6/15 in person during presentation)

    • Get instructors/faculty for additional help with the penetration depth analysis

    • Check if the epoxy is electrically insulating

    • Check if the light's brightness is adjustable using the voltage input

    • Research if there is an adapter for USB to ethernet and if it can still transmit the same amount of data across the same distance

  • From preliminary research, USB to ethernet adapters are mainly used for connecting devices to a local area connections and for wired internet access. We must conduct more research or test a connection like this with a camera to see if live video can be streamed through the connection.

    • • Check if we have access to a shaker table for testing

    • Asked Instructor for access to a shaker table for testing our mounting method

Comments from Other Students in the Class (indicate date of comments and if via email or in person)

• • Look into light diffuser (4/6/15 in person during presentation)

  • Consider the fogging of lens/ window (Samantha Huang, presentation comment)

  • Use diffuser for uniform lighting (Lingjie Kong, presentation comment)

Risks and Areas of Concern

• • Failure of plastic wet mates, may have to reorder better ones.

  • Call from Rossfelder resulted in concern over camera stability (camera has to be mounted very securely as to not break it from the violent vibrations)

Resources or Information Required but not Available

• • Resolution, number of pixels needed and picture size needed for picture of sediments

  • What types of sediments we will get

  • How the Vibrocorer goes from one hole to another

  • Shaker table needed

  • Additional help for depth penetration analysis

Schedule

• • Testing with initial parts coming in, evaluate whether or not we need to upgrade the parts.

  • Update Gantt chart.

Budget (list amount spent and amount remaining)

• • Spent-

    • $3.50 on marine epoxy....................... free shipping!

    • $21.00 on plastic wet mate receptacle-ship with next item

    • $6.00 on plastic cable connector-........$8.00 shipping

Progress on Report and Webpage