Created February 9, 2021 © GPL3+

Badol - The Gardian Drone

This is Guardian Drone For the Rescue Personnel

AdvancedFull instructions providedOver 2 days88

Bonus Prizes

NXP HoverGames Challenge 2: Help Drones, Help Others During Pandemics

Things used in this project

Hardware components

NXP KIT-HGDRONEK66

NXP 8MMNavQ Starter Kit

Arduino UNO

Arduino and Breadboard Holder

Software apps and online services

PX4

PX4 QGroundControl

Arduino IDE

Shotcut

Hand tools and fabrication machines

Soldering iron (generic)

Premium Female/Male Extension Jumper Wires, 40 x 6" (150mm)

Digilent Mastech MS8217 Autorange Digital Multimeter

Plier, Long Nose

Story

Natural Disasters in a pandemic situation like the one we are in now creates many challenges and life-threatening conditions for rescue providers. (https://www.telegraphindia.com/india/cyclone-amphan-in-bengal-misled-fireman-killed/cid/1776338).

My project focuses on safeguarding rescue personnel from life-threatening situations. Badol (meaning: clouds, in Bengali) is the guardian drone for safeguarding and protecting the rescue personnel.

The Design:

The hover games drone is mounted with a contactless voltage tester shown in figure 1.

Figure1: Contactless voltage detector mounted on the drone.

The construction of the contactless voltage detector is as follows:

Figure 2 shows the items required for the fabrication of the detector.

Figure 2: Items required for the fabrication of the contactless voltage detector.

Firstly, the probe is made with insulated copper wire, and the internal frame supporting the probe is fabricated and is illustrated in figure 3(a-c).

Figure 3: Image (a) shows the coiled probe and the internal frame support for the probe. Image (b) illustrates the measurement probe after assembly while image (c) is the magnified image of the probe.

Figure 4(a) shows the contactless voltage measurement circuit fabricated on a universal double-sided PCB. The yellow markings on the figure show the insulated wire used to fasten the probe onto the PCB and then attached to the breadboard using double-sided foam tape. Figure 4(b) illustrates the PCB's attachment and the Arduino Uno board on the baseplate.

Figure 4. Image (a) illustrates the circuit for contactless voltage measurement probe and image (b) shows the attachment of Arduino Uno and the circuit on the base plate.

The Setup

This section explains the setup for testing the contactless voltage testing prototype.

As seen in figure 5, I have used a tree branch and attached the phase wire from the mains. As a result, the tree branch is now conducting electricity.

Figure 5: The conducting tree branch.

The following video 1 showed the voltage measurement demonstration without contact with the tree branch and streaming the video to the ground station using GStreamer (inset). When there is no voltage, the LED on the circuit flickers, whereas in the presence of voltage on the tree branch, the LED always glows, and the brightness increases as the probe approach near the tree branch.

Video1: Demonstration of the Noncontact Voltage Measurement.

Conclusion

The project demonstrates a simple solution to avoid a dangerous and life threatening situation and safeguard the rescue personnel by giving them a clear perception of the ground scenarios before starting the rescue or restoration operation.

Code

Noncontact Voltage Measurement code

#include <Wire.h>
#include <Math.h>


#define sample 500                  //no. of samples the device takes per reading
float val;                          //place to store ta value from analogpin A5
int pin3 = 3;                       //output led


void setup() {
 
  Serial.begin(9600);
}

void loop(void)
{
  long average = 0;
  float c, s;
  while (1) {
    int16_t adc0;
    long sum, t;
    double  amplitude, cp, sp, phi;
    int i;
    sum = 0;
    i = 0;
    c = 0;
    s = 0;
    while (i < sample) {
      
     //Fourier analysis//
     
      adc0 = analogRead(A5) - 1023 * 3 / 5;
      t = micros(); //time in micro seconds
     
      //Replace 50.0 by 60.0 if your mains is 60 Hz
      phi = 6.2831853 * t / 1.0e6 * 50.0;
      c += (adc0 - average)  * cos(phi);
      s += (adc0 - average)  * sin(phi);
      sum += adc0;
      i++;
    }
    average = (sum / sample) ;
    i = 0; cp = c / sample; sp = s / sample;
    amplitude =  2 * sqrt(cp * cp + sp * sp);

    
    Serial.println(average);
    Serial.println(amplitude);         //For test and scaling
    
    //here the program takes the sum of all numbers in array1, and divides by the     number of elements "sample"
    val = amplitude;                   
    val = constrain(val, 0, 20);  //tweak it from from testing, 20 worked for me
    analogWrite(pin3, (val / 20.0 * 255.0));


  }
}

Credits

Nilanjan Mandal

4 projects • 11 followers

Thanks to Emmanuel2015.

Comments

Awards

Bonus Prizes

NXP HoverGames Challenge 2: Help Drones, Help Others During Pandemics

Badol - The Gardian Drone

Things used in this project

Hardware components

Software apps and online services

Hand tools and fabrication machines

Story

Schematics

Noncontact Voltage Measurement circuit

Code

Noncontact Voltage Measurement code

Credits

Nilanjan Mandal

Comments

Awards

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Badol - The Gardian Drone

Badol - The Gardian Drone

Things used in this project

Hardware components

Software apps and online services

Hand tools and fabrication machines

Story

Schematics

Noncontact Voltage Measurement circuit

Code

Noncontact Voltage Measurement code

Credits

Nilanjan Mandal

Comments

Awards

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