Research and Design » History » Version 8
Joseph Foley, 2012-02-23 22:46
Added some notes for the Arduino
1 | 1 | Kristján Gerhard | h1. Research and Design |
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3 | * [[FRDPRC Analysis]] |
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4 | 6 | Kristján Gerhard | * [[Debrief Notes for Test Launch]] |
5 | 1 | Kristján Gerhard | |
6 | 8 | Joseph Foley | h2. Balloons |
7 | 1 | Kristján Gerhard | |
8 | Types of high altitude balloons |
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9 | * Latex weather balloon - http://en.wikipedia.org/wiki/Weather_balloon |
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10 | * -Valved latex balloon- |
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11 | * -Superpressure balloon - http://en.wikipedia.org/wiki/Superpressure_balloon- |
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12 | * -Zero pressure balloon - http://www.eoss.org/faq/zero_pressure.htm- |
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13 | 3 | Kristján Gerhard | |
14 | 8 | Joseph Foley | h2. Testing |
15 | 3 | Kristján Gerhard | |
16 | * Impact test |
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17 | ** The name of house guard in Höfðatorg is Albert S:6618467 |
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18 | He said it will be no problem if we want to drop something of the roof for testing. The height of building is 74 m. Contact him one day before we want to do the test. |
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19 | |||
20 | * Freezer test |
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21 | |||
22 | 8 | Joseph Foley | h2. Release Mechanism from Seglagerðin |
23 | 3 | Kristján Gerhard | |
24 | 4 | Kristján Gerhard | * -We got offer from Seglagerðin Ægir for the release mechanism. Which is two fabrics under and over the balloon with two zip on the top fabric to release the balloon 94440kr with tax, 75251kr with out tax. We are looking for lower price.- |
25 | 3 | Kristján Gerhard | |
26 | 8 | Joseph Foley | h2. Release Mechanism Test |
27 | 3 | Kristján Gerhard | |
28 | Bogi, Örvar and Vikar made a test on the release mechanism. |
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29 | The results from test: |
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30 | * If it is windy the fabrics flap a lot and can damage the balloon. |
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31 | * The coses did not fit together as we expected so we could not zip two fabric together. |
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32 | * Have to find another way, f.x find large house and fill the balloon inside. |
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33 | 5 | Kristján Gerhard | |
34 | 8 | Joseph Foley | h2. Electronics |
35 | 5 | Kristján Gerhard | |
36 | We may want to consider replacing the SPOT device because of it's 24h limitation and track frequency. |
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37 | |||
38 | Alternative devices |
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39 | * http://www.cybergraphy.com/English/gps_satellite.htm |
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40 | * http://www.spidertracks.com/store/spiders/spider-s3-lite |
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41 | ** Uses Iridium |
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42 | ** Max tracking height is 18km |
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43 | 1 | Kristján Gerhard | * http://www.yellowbrick-tracking.com/?page_id=1555 |
44 | ** Uses Irridium |
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45 | ** Max height unknown - inquiry sent via email |
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46 | |||
47 | * Comparison of GPS recievers regarding maximum height |
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48 | 8 | Joseph Foley | |
49 | h3. Control system |
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50 | |||
51 | Niklaus (with guidance from Joe) is working on the Arduino control system. |
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52 | |||
53 | * Failsafe (cut string) |
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54 | ** ni-chrome wire heater via a MOSFET |
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55 | ** Simple: timer that cuts after some predicted time |
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56 | ** GPS: cuts when farther than the boundary of Iceland |
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57 | * Sensors |
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58 | ** GPS |
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59 | *** Arduino Logger shield http://www.adafruit.com/products/98 USD19.50 |
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60 | *** EM-406A GPS Module http://www.adafruit.com/products/99 USD60.00 |
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61 | ** Temperature |
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62 | *** Light and temperature logger shield http://www.adafruit.com/products/249 USD37.50 |
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63 | ** Pressure (altitude) |