What it does

A firefighter robot control unit, that can actively sense the presence of fire and tries its best to put it off autonomously. It can sense fire no matter how the robot is oriented in a place. 

IoT connectivity to get you notified, if any mishap occurs, no matter where you are(of course not inside deep caves, or the middle of the ocean. 

How it works

The power supply receives an unregulated dc power supply from the outside, preferably a battery, and creates voltage levels with ample amount of current for different components. 

The sensor circuitry is responsible for sensing the flame. As we know, that fire emits infrared radiations(700 nm to 1 mm), we use photodiodes to measure peak wavelengths of around 650nm. With having 6 of them placed for omnidirectional sensing. An analog multiplexer, multiplex these signals and sends them to the MCU.

The Main Control Unit (MCU) is the brain of the system. It interfaces with the sensor circuit by addressing the analog multiplexer since it has only one ADC. After reading the signals from the 6 sensors, it computes centroid and approximates the position of the burning fire. And after moving towards the fire, it switches to PID control to navigate the robot near to the fire. Then it actuates the relay. 

Along with that, it has WiFi so that it can be connected to the network and act as a thing of IoT. It can notify you about the mishap instantly. Thus being a major player in critical situations like fire.

And last but not the least, the driver circuit, which as the name suggests drives or actuates by receiving the control signal from the MCU. It can drive four to eight motors for the movement of an autonomous robot. It also contains a relay that can actuate any high power element such as a water pump to push water, or a strong electromagnet, or a solenoid to trigger a fire extinguisher.