We all know that the COVID-19 is serious issue now a days. In the house we all are safe but some people are still working outside and they need to sanitize the whole body for prevention from COVID-19. This virus is spread through the touch so we make a device which is used for sanitize the body without touching any object. If the person can enter the tunnel the whole body will get sanitize through a spray. The disinfectant solution used consists of a combination of sodium hypochlorite (NaOCl) and water (H2O).
Where we can use this Disinfectant Tunnel?
This tunnel are used in the most of place like hospitals, malls, police station, all the government offices and buildings. So peoples are first sanitize and after that they can go to offices and home safely without any infection.
The Tunnel :
We laid this tunnel with the help of mild steal rod. This frame work fabricated from mild steal box covered with poster. The banner is easy to attach with the metal profile with plastic ties. It's fast and does not require special skills.
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A plastic and a pump for the high-pressure pipe system is located on the side of the tunnel which is connected to the micro tubing pipes with spray nozzle Assembly. Micro tubing pipes have been used throughout the tunnel to supply the solution. Nozzle rotates through a half turn to provide spray selection from wide angle, finely atomized cone spray to a straight stream spray. We use 5 nozzle in one Tunnel so that most of the solution can touch by human body and get sanitize properly.
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On the front side of the tunnel we fit a Box. In that box we make a connection of Arduino, ultrasonic sensor and relay.
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Electronic hardware description
The automatic disinfected tunnel actually work on ultrasonic sound. Whenever the human body comes inside the tunnel, ultrasonic sensor will detect and we can calculate the distance. It gives us a HIGH signal through the output pin. Once there is a human, ultrasonic sensor detects it will give LOW signal to the relay module which means that the relay will turn on, and as a result the Power relay will turn on the Ac pump motor for 15 seconds for spraying. And will get until the next human will not enter. In this way the system is working for spraying the solution and disinfecting the human from virus.
Code for disinfectant tunnel. Upload it in arduino nano using arduino ide.
/* The Disinfectant tunnel project is made by Anil Choudhary, Abhishek Patil and Prajakta Jadhav
* Component included:
* Arduino Nano R3
* Ultrasonic Sensor HC-SR04
* 5v 1 channel relay module
*
* Connection
* Arduino Nano R3 ------> Device
* Nano D4 pin ------> Ultrasonic trig pin
* Nano D5 pin ------> Ultrasonic Echo pin
* Nano D7 pin ------> Relay Module input pin
*/
#define trigPin 4 //Defining the Ultrasonic trigger pin which is connected on arduino nano d4#define echoPin 5 `//Defining the Ultrasonic Echo pin which is connected on arduino nano d5#define relay 7 //Defining the Relay input pin which is connected on arduino nano d7long duration; // Variable
int centimeter; // Variable for storing the distance
void setup(){ Serial.begin(9600); //Function to begin the serial monitor
pinMode(trigPin,OUTPUT); //Defining the trigger pin as OUTPUT
pinMode(echoPin,INPUT); //Defining the Echo pin as INPUT
pinMode(relay,OUTPUT); //Defining the Relay input pin as OUTPUT
digitalWrite(relay,HIGH); // Keep relay pin High for turn off the output
}void loop(){ distance(); // Calling the function to get distance
if(centimeter < 30) // If distance is less then 30cm then relay output low that means to turn on the output
{ digitalWrite(relay,LOW); Serial.println("ON"); delay(15000); //Keep on for15 seconds
}else // Otherwise turn it off
{ Serial.println("OFF"); digitalWrite(relay,HIGH);}}void distance() // Fucntion for calculating the distance using ultrasonic sensor
{ digitalWrite(trigPin, LOW); delayMicroseconds(5); digitalWrite(trigPin, HIGH); delayMicroseconds(10); digitalWrite(trigPin, LOW);duration= pulseIn(echoPin, HIGH);centimeter= duration*0.034/2; Serial.print("Distance = "); Serial.print(centimeter); Serial.println(" cm");}
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