Atmospheric Microbial Sampling System

The goal of the project is to aseptically collect microbial samples from the jet stream using a simple and efficient sampling device.

=Problem Definition= Little research or information is known about the microbial life in the jet stream. For the purpose of the project, a sampling system will be developed in order to collect microbial samples while being contaminant free for further analysis.

Background
Studies speculate that microorganisms, some being pathogenic, can travel through the jet stream. In order to learn more about the atmospheric microorganism content, a method of sampling must be developed.

Deliverables
Once completed the sampling system will aseptically collect microbial life for classification of the microbiological taxa of the stratosphere. As well as providing records and data of temperature, humidity, and pressures at different altitudes.

Specifications
This sampling system is intended to collect microorganisms from the jet stream. The system design must keep sample collectors sterile before the launch and must prevent any contamination after the flight. Control systems of the device will be programmed to read the temperature, humidity, and pressure of the surrounding environment through sensors as the system ascends higher into the stratosphere. The determined launch platform is a high altitude balloon along with a parachute system for the descent. Samples collected from successful launches will be PCR replicated and DNA sequenced for exact microbial classification.

=Design Considerations= Both images below illustrate 3-D images of the proposed sampling system design. The system itself will be composed of 3 main pieces: The Impactor(bullet shaped object), collection cylinder, and collection media base plate. To the left is the initial drawing of the sampling system design. The geometry of the device resembles that of a bullet, but the shape itself aids in the collection of microbial samples. The inside upper portion of the impactor is funnel shaped in hopes of guiding airflow towards the collection media and increasing optimal microbial sampling. Small openings all along the device will act as vents to allow air flow and circulation. Figure 2 on the right labels measurements for the sampling system. The system as a whole will be fair sized for all components included. These are not the final measurements, but they will be close.

=Project Learning=

Control Systems
To properly carry the function of collecting microbial samples, the electrical engineers of the team, Tian and Alex, did research on the control systems necessary to incorporate into the device. The intended control systems will be programmed through an Arduino board. Sensors such as the Honeywell, Ultra-Low temperature data logger, and the Adafruit will record temperature, humidity, and pressure of the surrounding environment at the given altitude.

GPS/Tracking
Prior to having begun the sampling system project, Team Highsky attended a different systems launch that was overseen by Dr.Joseph Law. At the launch we learned that apart from the actual device, the tracking systems are a very huge priority. After having done researching, we decided on pursuing the APRS system and the Spot GEN3. The APRS system will track our device at the higher altitudes and the Spot GEN3 will track our device at ground level.

Design Analysis
This process was the easier one compared to the control systems. To avoid any learning curves, we utilized the tools we had to draw the sampling system and then transferred it to Solidworks in order to utilize its various analysis tests.

=Final Design=

=Validation= Since having begun the project, only one test has been ran with the project design. The 3-D model of the proposed design drawn on AutoCad was transferred to Solidworks in order to run an airflow analysis. The test performed was successful in tracking and recording airflow throughout the system. Further tests will performed later to analyze the use of different materials for the system.

=Team Members=

=Additional Documentation=

Project Schedule



Meeting Minutes



Client Interview