Gas bubbles reduces the quality of the soldesSoRGE: done in pressurized enviromentCLEAR: finding a solution to the problem, simular to our projectApplications: reparing or improve space crafts, save money
Gas flow: create a movement in the soldesNeed a rocket: This phenomena only occurs in reduced gravity
Additional tests done for comparison
We will seek funding from:We will also seek sponsorships for material and components.
We will have access to:We will be able to perform tests…The project is also supported by the Depart… where we have access to there facilities.
Alf and Kjell, with years of experinence from baloon and rocket campaigns at Esrange in Kiruna are supervising and supporting the SOLAR project In luleå we are supported by the depart….which we can consult if any problems occure. The team will have a close relation to:
Internet is a a perfect way to reach a large audience. First of all we will create a website where u can find our contact info, learn more about our experiment and about the Rexus-project. It is also a place where our sponsors can be presented. Facebook allows us to update the audience with news and pictures about the forthcoming of the project and we can easily answer to questions. The blog is a fine way to update with pictures and information about the project. Youtube and twitter belongs to the future part of the outreach program. On youtube we can publish videos of launch and tests during the project and if there is a large audience we will use twitter as a quicker way to post updates about the project.
These are a few examples of the magazines that we will contact to be published so that we can intrest others to space science and inspire other students to participate in projects. Television and Radio allows to do the same but reach a wider audience than by magazines.
There is a lot of acitivities at the university where we could give a presentation about our experiment but also about the Rexus project. We would also like to give presentations at high schools so that we can inspire them to find an intrest in science but also just to inspire them to continue there studies after high school graduation.
Anders – studying towars master in space engineering and participated in The Bexus project Marvel previous year.Adrian – Hard ware coordinator, studying towards master in aerodynamicsBjörn – soft ware coordinator, master in computer science and imbedded systems.Martin – master in spacecraft and instrumentation focusing on development of electronics. Anneli and Johan are the outreach coordinators. I have been responsible for the outreach programs in several different student groups including seeking sponsorships.
SOLdering Alloys in Reduced Gravity
Background Issues of soldering in reduced gravity Gas bubbles from PCB Previous experiments SoRGE ○ Found a problem with soldering in milli-gravity CLEAR ○ Finding a solution to the problem found in Sorge Applications Reparations of components in space ○ Long distance space journeys and space stations
Experiment proposal Our solution Non pressurized enviroment ○ Overpressure and sample diffusion Gas flow ○ Internal flux of solder Need for a rocket Reduced gravity
The experiment will melt and cool nine samples Atmosphere ○ Reference sample at 1atm Vaccum Gas flow with noblegas Additional test done on ground Reference sample
Flow Chamber with argon gas Gas flow starts with melting process Using liquid nitrogen in the cooling chamber Gas flow starts when samples are melted Enough gas to cool below melting temperature
Data Mass The experiment ○ 5.4 kg Electrical components ○ 1 kg Gas container and valves ○ 1.6 kg Volume The experiment ○ 4.8 dm³
Microcontroller and sensors – How it all fits together
Components Microcontroller 32bit ARM Cortex M3 ○ 2*16 12bit-ADC-channels Sensors Temperature ○ KTY84-150 Small size Large temperature range Pressure ○ XFHMC-001MPGR(H) Temperature compensated Large measuring range
Batteries Saft batteries 7.4V / 4A / 40Wh / 265g Wide temperature range Transistors High power MOSFET Fed through a MOSFET driver Valve Currently looking in to electronic valves
Analysis of samples CT scan University in Finland Comparing samples From same chamber Between chambers With reference samples Compile test data into a report Report will evaluate if methods are viable
Our outreach program Project funding and supporing professors
Funding sources Swedish institute of space physics, Kiruna Swedish national board Division of space technology, LTU Sponsorship
Facilities Division of space technology, Kiruna Computer simulation tools Workshop Swedish institute of space physics, Kiruna Tests and development Department of material engineering, Luleå
Expert advice Department of space science, IRV, Kiruna Support from experts in the field of space engineering Alf Wikström & Kjell Lundin Esrange, Kiruna Department of material engineering, Luleå University lecturer Esa Vuorinen, Material science department, Luleå
Media our plan for getting noticed Publications in magazines Newspapers have been positive to previous projects Television/Radio Several radio and tv-stations have had coverage of previous projects
Presentations Seminars Spread intrest of space science Luleå university of technology Present project to new students Introduce Rexus/bexus High schools Inspire the younger audience
Organisation and key people Team leader Anders Svedevall Hardware Electronics Software Outreach group group group group Adrian Lindqvist Martin Eriksson Björn PaulströmJohan Strandgren Anneli Prenta Sara Widbom Elisabet Wejmo Johan Strandgren Hamoon Shahbazi Anneli Prenta
Questions from youQuestions to you ”With great power comes great responsibility” - Batman
32bit ARM Cortex M3 Specifications 72Mhz, 20Kb SRAM 128Kb Flash memory Role Collecting and storing data Controlling temperature of heat plate Ongoing measurements of pressure and temperature Initiates events based on a timeline
KTY84-150 Specifications Resistance=f(temperature) Low operating current (2mA) Small size – 1.6x3.04mm Large temperature range (-40 to +300 °C) Role Measure temperature at each individual sample
XFHMC-001MPGR(H) Specifications Large measuring range - 0 to 1000KPa Low power (<10mA) Small size(14x7.6x10.15) Role Measuring pressure in each of the sample chambers
Batteries – 2 VL 34570 Specification 7.4V / 4A / 40Wh / 265g Wide temperature range Lithium Ion cells Rechargeable Role Delivers power to the heating element
Valve – AKVH 10 Specifications PWM controlled Role Regulate the flow of argon gas through one of the test chambers Activate
Transistor Specifications PWM controlled Role Regulating current through the heating element, which controls temperature.