Team:Worldshaper-XSHS/Demonstrate
Product demonstration
The first generation product.
According to the results of the survey and interview, we designed two generations of products. Due to limited time, we only made models of the first generation product. The design of the second generation model has been improved based on the first generation, which made up for the deficiency of the first generation.
The first generation product was a stationary nicotine testing device (see wiki). The instrument was divided into three parts: air inlet pipe, box body and air outlet pipe. The chamber was filled with bacteria liquid. A fan was used to extract the upper part of the gas to form a low-pressure area. The atmospheric pressure wouldl pump the gas to be tested from the other side into the inlet pipe, which was bent down and connected to the bottom of the device, so that the gas could fully contact with the liquid and water-soluble nicotine could be transferred from the air into the bacteria liquid. After that, we got the bacterial fluid that expressed the fluorescent protein under the effect of nicotine, measured the fluorescence, and calculated the nicotine concentration.
We used 3D printing technology to construct our product design into a physical model. The main body of the product model was a cuboid of 15cm in length, 7cm in width and 7cm in height. (see below). The air inlet and outlet with diameter of 2cm were also provided.
The Second generation product.
In the design of the second generation product (see Wiki), we reduced the device size (as shown in the figure below)-the actual internal bottom area was about 16cm squared-and the amount of bacterial liquid needed to work. The equipment also adopted the pump type piston pumping way, which enabled filters device to reduce the possible escherichia coli leakage properly. Because the piston was used to pump air, the gas column was fixed when the piston pumped back and forth, bringing great convenience for us to exactly extract the volume we want.
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