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After the drinking water source of Flint, Michigan was changed in 2014, 100,000 residents were exposed to elevated lead levels and as a result, around 6,000 to 12,000 children are likely to experience a range of serious health problems in the future.

My idea is building a device that can stop these unfortunate events that are happening in the US and all around the word. For this purpose, my aim is to design a test tower capable of measuring important properties of water, like PH, temperature, salinity, turbidity and heavy metal level.

The tower will be placed besides water pipe lines and will be connected to the pipeline. The water will flow through the tower. The tower will take sample from the water, test the sample, and then drain the sample.

The test tower consists of four sections:

1-sample taker:
This part consists of control valves and pipes. To make sure that sensors work accurately and stay operational for a long time, sensors shouldn’t face the direct flow of water continuously. Because the momentum of water flow can harm the sensors, sensors will be placed inside an empty chamber in this design. When there is a need for sensors to test the water quality, a control valve lets water flow through the empty chamber. When the testing process is finished, another control valve will drain the test chamber.

2-test equipment:
The test equipment section consists of different kinds of sensors and a microcontroller that operates them. The sensors part is fully modular. We can add or remove sensors depending on the situation. For example if a nuclear war happens, we can add a radiation detector.

3-transmission part:
This device uses LPWAN for transmission, because LPWAN is cheap, energy efficient (low power). Moreover it can send data for a long distance (up to 10Km). The transmission antenna is placed inside the tower, and the transmission circuit is placed next to the microcontroller.

4- Power section:
For power generation, there is a 4 squares feet dollar panel on top of the tower that can produce 60 watts under sunlight. If the solar panel just earns 4 hours of sunlight per day, then we have 240 watt hour energy, which is more than enough energy for our application. But, to save energy for cloudy days, a 200 watt hour battery is placed inside the tower.

Inspiration

I think that these simple IOT ideas can help big companies to manufacture new products, and improve human life in future.

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