We are surrounded by a huge number of water bodies across the globe. In spite of that water scarcity is one of the major global concerns. One of the greatest reasons being people are unaware if the water available around them can be made potable or not. There is a shortage of data about the water quality in several water bodies. If we have the suitable amount of data then these water reservoirs can be treated accordingly and made fit for various activities like drinking water, industries, hydroelectricity, cooling purposes etc.
Multitasking makes every activity smarter. Fishing forms a major part of the economy in most of the countries around the globe. Our module makes fishing boats capable of acquiring enough data about water bodies near fisheries, lakes, rivers, seas, etc.
Our device is a robust and compact streamlined case to be attached in the hull of the fisherman's boat. The streamlined shape is to make sure that the module does not cause any kind of disturbance to the path of the boat. This case will be 3D printed which will make the manufacturing easy and cost-efficient. The whole device consists of 3 cases. The outer case will have holes and slits in it which allows the water to enter the device, this structure basically acts as a protection layer to the inner structure of the sensors. The second case is an extra layer of protection to the main inner case form water, there is a buffer space between the second and the third (inner) case which will water detection system in it. If water is detected in this region the control board will turn off all the other systems by going into deep sleep and will emit an alert signal at an interval of 15 minutes. The inner case consists of 3 sections. One containing the GPS module and sensors to test the acidity, temperature, dissolved oxygen and turbidity of the water. The second containing an ESP8266 and the third one holding the battery system to power the other 2 sections. The sensor probes will emerge out to the region inside the outer shell for taking the readings. The holes from where the probes emerge will be sealed pneumatically. As the fishermen venture out, the water quality will be checked at an interval of 10 mins and the water quality data will be stored along with its accurate location and for rest of the time, the board will go into deep sleep mode to reserve battery. In deep sleep mode the controller board needs very less amount of current, nearly 16 micro amps. All the areas covered by the fishermen across the water body will be sensed.
Thus we will collect the suitable amount of data to infer the water quality and to categorize it in respective purposes. An open network for the mobile sensor packages will be formed at the shore where the boats will dump the data with the respective time of recording and GPS coordinates, it collects on a day to day basis. Data can be exchanged between boats with the uid code of the sensor package that has recorded the data to reduce delay in accumulation of data at the shore form an ad hoc network. A li-po battery is used to power the whole system and for charging the battery small photovoltaic cell will be mounted on top of the boat, and we also have a Lithium-ion battery as backup power.
Furthermore, a smart power management system will be included which shall detect, that, if there are more boats traveling alongside within a small range. If this condition is true then all the modules will coordinate with each other and accordingly turn off one or more sensors which is working in the other module. This will reduce a significant amount of energy used and will also reduce the redundancy of data.
Similar modules will be installed at the shore to collect data near the shore, further this data can be compared to the data offshore which will make the analysis more accurate. For all the communication MQTT communication protocol will be used.
This module can be attached to any boat but the main focus is on fishing boats because they sail on a daily basis.
Besides, there will be a safety feature provided to the fishermen. In case of a storm or isolation or any other kind of danger, each boat will be able to send emergency alerts to the nearest boat or the nearest shore. An end to end integration between the boats and the shore is made available.
Our module comes at a very economical price with very less maintenance cost. The cost of the whole module is roughly Rs. 3000 but the will can be reduced when we design our own PCB containing all the sensors and networking module on a single board. Not only is the water quality determined but also the safety of fishermen is enhanced.