thermal investigation for accurate temperature measurement
DESCRIPTION
Thermal Investigation for Accurate Temperature Measurement. Team TCTJ Truc Le Cedric Toguem Jonathan Newman. Overview. Mission Goal Objectives Science Background Technical Background Payload Design Electrical Software Mechanical Payload Development. Mission Goal. - PowerPoint PPT PresentationTRANSCRIPT
![Page 1: Thermal Investigation for Accurate Temperature Measurement](https://reader036.vdocument.in/reader036/viewer/2022070501/5681692c550346895de06ebc/html5/thumbnails/1.jpg)
Thermal Investigation for Accurate Temperature Measurement
Team TCTJTruc Le
Cedric ToguemJonathan Newman
![Page 2: Thermal Investigation for Accurate Temperature Measurement](https://reader036.vdocument.in/reader036/viewer/2022070501/5681692c550346895de06ebc/html5/thumbnails/2.jpg)
Overview•Mission Goal•Objectives•Science Background•Technical Background •Payload Design
• Electrical• Software
• Mechanical•Payload Development
![Page 3: Thermal Investigation for Accurate Temperature Measurement](https://reader036.vdocument.in/reader036/viewer/2022070501/5681692c550346895de06ebc/html5/thumbnails/3.jpg)
Mission GoalThe goal is to determine why previous LaACES payloads failed to correctly measure temperature in comparison to NOAA.
![Page 4: Thermal Investigation for Accurate Temperature Measurement](https://reader036.vdocument.in/reader036/viewer/2022070501/5681692c550346895de06ebc/html5/thumbnails/4.jpg)
ObjectivesMeasure the temperature inside and outside the boundary layerMeasure the temperature with different color coated temperature sensors.Measure the temperature on the inside and on the outside surfaces of the payload.Have the payload returns intact.
![Page 5: Thermal Investigation for Accurate Temperature Measurement](https://reader036.vdocument.in/reader036/viewer/2022070501/5681692c550346895de06ebc/html5/thumbnails/5.jpg)
Temperature change in the Atmosphere
• Troposphere (0 to 12km) : lowermost atmosphere where temperature decreases from 30 to -80°C• Stratosphere (12 to 48km): second lowermost part of the atmosphere where temperature increases from -80 to 0°C
http://apollo.lsc.vsc.edu/classes/met130/notes/chapter1/vert_temp_all.html
![Page 6: Thermal Investigation for Accurate Temperature Measurement](https://reader036.vdocument.in/reader036/viewer/2022070501/5681692c550346895de06ebc/html5/thumbnails/6.jpg)
Boundary LayerThin layer of fluid in contact with a solid
body that flows more slowly than the rest of the fluid
As the payload gains altitude in fluid air, the boundary layer around it will be affected by heat transfer processes
http://apollo.lsc.vsc.edu/classes/met130/notes/chapter1/vert_temp_all.html
![Page 7: Thermal Investigation for Accurate Temperature Measurement](https://reader036.vdocument.in/reader036/viewer/2022070501/5681692c550346895de06ebc/html5/thumbnails/7.jpg)
Heat Transfer ModesHeat can be transferred in three
different ways:- Conduction- Convection- Radiation
http://blogs.saschina.org/morena01pd2016/files/2009/10/ccr.jpg
![Page 8: Thermal Investigation for Accurate Temperature Measurement](https://reader036.vdocument.in/reader036/viewer/2022070501/5681692c550346895de06ebc/html5/thumbnails/8.jpg)
ConductionTransfer of thermal energy between
molecules due to temperature gradient
The energy flows from a region of higher temperature to a region of lower temperature
![Page 9: Thermal Investigation for Accurate Temperature Measurement](https://reader036.vdocument.in/reader036/viewer/2022070501/5681692c550346895de06ebc/html5/thumbnails/9.jpg)
Convection
Movement of molecules within fluid
A shallow layer of air in contact with a hotter surface warms by conduction, acquires buoyancy and then rises
![Page 10: Thermal Investigation for Accurate Temperature Measurement](https://reader036.vdocument.in/reader036/viewer/2022070501/5681692c550346895de06ebc/html5/thumbnails/10.jpg)
RadiationElectromagnetic radiation emitted from the
surface of an object in the form of heat due to the objects temperature
If an object is warmer than its surrounding environment, it will emit more radiation in the form of heat into the surrounding environment than it will absorb in order to attain thermal equilibrium
http://www.tsc.com/irgen/Image7.gif
![Page 11: Thermal Investigation for Accurate Temperature Measurement](https://reader036.vdocument.in/reader036/viewer/2022070501/5681692c550346895de06ebc/html5/thumbnails/11.jpg)
Test 1: Radiation Test 1Radiation test:
Sun →Electromagnetic radiation → Space →Sensors
The test will consist of different color shielding to reflect the electromagnetic radiation from the sun
http://image.tutorvista.com/content/dispersion
![Page 12: Thermal Investigation for Accurate Temperature Measurement](https://reader036.vdocument.in/reader036/viewer/2022070501/5681692c550346895de06ebc/html5/thumbnails/12.jpg)
Test 2: Radiation Test 2Radiation Test:The payload circuitry will emit radiation
to the sensor.Distance from the radiation source will
determine the amount of heat dissipated
http://images.google.com/imgres?imgurl=http://www.uos.harvard.edu/images/ehs/radiation
![Page 13: Thermal Investigation for Accurate Temperature Measurement](https://reader036.vdocument.in/reader036/viewer/2022070501/5681692c550346895de06ebc/html5/thumbnails/13.jpg)
Test 3: Boundary Layer Test
Sensors are placed at different distance from the exterior surface of the payload
Determine how much effect the boundary layer has on the measured temperature
http://www.google.com/imgres?imgurl=http://www.engineering.leeds
![Page 14: Thermal Investigation for Accurate Temperature Measurement](https://reader036.vdocument.in/reader036/viewer/2022070501/5681692c550346895de06ebc/html5/thumbnails/14.jpg)
Thermal Boundary Layer
![Page 15: Thermal Investigation for Accurate Temperature Measurement](https://reader036.vdocument.in/reader036/viewer/2022070501/5681692c550346895de06ebc/html5/thumbnails/15.jpg)
Payload DesignPower Source
TemperatureSensorsOp AmpBalloonSat
CPU
![Page 16: Thermal Investigation for Accurate Temperature Measurement](https://reader036.vdocument.in/reader036/viewer/2022070501/5681692c550346895de06ebc/html5/thumbnails/16.jpg)
Electrical Design
Power Supply
Sensors BallonSat
Electrical Design (lowest level)
![Page 17: Thermal Investigation for Accurate Temperature Measurement](https://reader036.vdocument.in/reader036/viewer/2022070501/5681692c550346895de06ebc/html5/thumbnails/17.jpg)
Sensors
![Page 18: Thermal Investigation for Accurate Temperature Measurement](https://reader036.vdocument.in/reader036/viewer/2022070501/5681692c550346895de06ebc/html5/thumbnails/18.jpg)
Sensor Interfacing
Power Supply
Sensors BalloonSat(ADC)Op-Amp0~800mV 2.5~3Vtemperature
5V DC
Sensor Interfacing
![Page 19: Thermal Investigation for Accurate Temperature Measurement](https://reader036.vdocument.in/reader036/viewer/2022070501/5681692c550346895de06ebc/html5/thumbnails/19.jpg)
Flight Power Supply
12V battery
5V battery
Sensors Op - Amp BalloonSat
Flight power supply
![Page 20: Thermal Investigation for Accurate Temperature Measurement](https://reader036.vdocument.in/reader036/viewer/2022070501/5681692c550346895de06ebc/html5/thumbnails/20.jpg)
Power BudgetComponent
Current (mA)
Duration (hrs.)
Capacity (mA-h)
BalloonSat 51 (measured)
4 275
RTDs (x7) 1 each (estimated)
4 28
Total 58 4 303
![Page 21: Thermal Investigation for Accurate Temperature Measurement](https://reader036.vdocument.in/reader036/viewer/2022070501/5681692c550346895de06ebc/html5/thumbnails/21.jpg)
Flight SoftwarePre-Flight and During Flight
Sensor Data
Read
ADC
BalloonSat
Real Time Clock
Write
Read
Memory
![Page 22: Thermal Investigation for Accurate Temperature Measurement](https://reader036.vdocument.in/reader036/viewer/2022070501/5681692c550346895de06ebc/html5/thumbnails/22.jpg)
Flight SoftwarePost-Flight:
Memory BalloonSat
Read Basic Stamp Editor
Excel
![Page 23: Thermal Investigation for Accurate Temperature Measurement](https://reader036.vdocument.in/reader036/viewer/2022070501/5681692c550346895de06ebc/html5/thumbnails/23.jpg)
Flight SoftwareOnboard Flight Program:
LoopPause
Read
WriteEnd If/Then
![Page 24: Thermal Investigation for Accurate Temperature Measurement](https://reader036.vdocument.in/reader036/viewer/2022070501/5681692c550346895de06ebc/html5/thumbnails/24.jpg)
Flight SoftwarePost Flight Program:
AnalyzeRead Transfer to Excel
![Page 25: Thermal Investigation for Accurate Temperature Measurement](https://reader036.vdocument.in/reader036/viewer/2022070501/5681692c550346895de06ebc/html5/thumbnails/25.jpg)
Exterior Mechanical Design
![Page 26: Thermal Investigation for Accurate Temperature Measurement](https://reader036.vdocument.in/reader036/viewer/2022070501/5681692c550346895de06ebc/html5/thumbnails/26.jpg)
Interior Mechanical Design
![Page 27: Thermal Investigation for Accurate Temperature Measurement](https://reader036.vdocument.in/reader036/viewer/2022070501/5681692c550346895de06ebc/html5/thumbnails/27.jpg)
Weight BudgetComponent Weight (g)BalloonSat 66 (measured)Styrofoam Structure 150 (estimated)BalloonSat Styrofoam Attachments
25 (estimated)
Wiring 7.5 (estimated)Booms (if balsa) 3 (estimated)Booms (if plastic) 10 (estimated)Boom attachments 25 (estimated)Sensors 10(estimated)Total 289.5-296.5 +/- 25%
![Page 28: Thermal Investigation for Accurate Temperature Measurement](https://reader036.vdocument.in/reader036/viewer/2022070501/5681692c550346895de06ebc/html5/thumbnails/28.jpg)
Payload Development PlanMechanical
◦Boom prototyping◦Attachment prototyping◦Impact test to find best design to
store components◦Maintain payload within regulation
![Page 29: Thermal Investigation for Accurate Temperature Measurement](https://reader036.vdocument.in/reader036/viewer/2022070501/5681692c550346895de06ebc/html5/thumbnails/29.jpg)
Payload Development PlanElectrical
◦Determine best temperature sensor to use
◦Determine best batteries to use and its configuration
◦Design the circuitry of the system◦Determine how well the components
will function in flight climate◦Determine methods of calibration of
the sensors
![Page 30: Thermal Investigation for Accurate Temperature Measurement](https://reader036.vdocument.in/reader036/viewer/2022070501/5681692c550346895de06ebc/html5/thumbnails/30.jpg)
Payload Development PlanSoftware
◦Determine best way to consume less power
◦Determine if extra memory will be needed and how to access it
◦Determine the timing sequence ◦Determine methods of calibration
![Page 31: Thermal Investigation for Accurate Temperature Measurement](https://reader036.vdocument.in/reader036/viewer/2022070501/5681692c550346895de06ebc/html5/thumbnails/31.jpg)
Reference1. Clavius: Environment - heat transfer.
http://www.xmission.com/~jwindley/heatxfer.html. November 24, 2009
2. Anne E. Egger "Earth's Atmosphere: Composition and Structure," Visionlearning Vol. EAS 2003. http://www.visionlearning.com/library/module_viewer.php?mid=107
3. Sad Dr Rodrigue – Introduction to physical Geaography. http://www.csulb.edu/~rodrigue/geog140/lectures/thermalstructure.html
4. BASIC Stamp 2p 24-Pin Module. http://www.parallax.com/Store/Microcontrollers/BASICStampModules/tabid/134/ProductID/7/List/1/Default.aspx?SortField=UnitCost,ProductName. November 25, 2009
![Page 32: Thermal Investigation for Accurate Temperature Measurement](https://reader036.vdocument.in/reader036/viewer/2022070501/5681692c550346895de06ebc/html5/thumbnails/32.jpg)
Questions?