Project 2 - Measuring the distance of an object using ultrasonic sensor and also smoothen the sensor data using moving average filter

Overview of the Project: 

In this project the implementation of code for “Measuring distance of an object using ultrasonic distance sensor (28015 Ping) and also smoothen the sensor data using moving average filter”.

Goals:

• Measuring the distance in terms of inches of an object using Ultrasonic Distance Sensor (28015 Ping).
• The sensor data is smoothened by using Moving average filter technique to eliminate the high frequency variations from the sensor data.

Key Highlights of the Project: 

• Measuring the distance travelled by the wave to the object and gets bounced back from the object to sensor.
• Smoothening the sensor data by moving average filter technique, the filter has a window of certain size. That window determines that how many data the filter can take.

Deliverables of this project: 

• The distance travelled by a wave to the object for which we want to measure the distance using Ultrasonic Distance Sensor (28015 Ping).
• Eliminate the high frequency jitters from the sensor data by Moving Average filter to smoothen the sensor data.

Expected Outcomes: 

The students will get the Knowledge on Ultrasonic sensor (28015 Ping) to measure the distance travelled by wave to the object, the hardware connection of 2 Arduino’s connected to the sensor and smoothening the sensor data by removing high frequency variations using Moving Average Filter Technique.4

Ultrasonic Sensor

 

 

Ultrasonic sensors work by emitting sound waves at a frequency too high for humans to hear. They then wait for the sound to be reflected back, calculating distance based on the time required. This is similar to how radar measures the time it takes a radio wave to return after hitting an object

CODE

#include

#define trigger 9

#define echo 10

LiquidCrystal lcd(7,6,5,4,3,2);

float time=0,duration=0;

long sum=0;
long avg,inches=0;

void setup()

{
Serial.begin (9600);

lcd.begin(16,2);

pinMode(trigger,OUTPUT);

pinMode(echo,INPUT);

lcd.print(" Ultra sonic");

lcd.setCursor(0,1);

lcd.print("Distance Meter");

delay(2000);

lcd.clear();

}

void loop()

{
digitalWrite(trigger,LOW);

delayMicroseconds(2);

digitalWrite(trigger,HIGH);

delayMicroseconds(10);

digitalWrite(trigger,LOW);

delayMicroseconds(2);

time=pulseIn(echo,HIGH);

duration=(time/2)/29;

inches = (duration/2) / 74; // Divide by 74 or multiply by 0.0135

for (int i=0; i<5; i++)
{
sum=sum+inches;
avg = sum/5;
}

lcd.clear();

lcd.print("Distance:");

lcd.print(duration);

lcd.print("cm");

lcd.setCursor(0,1);

lcd.print("Average:");

lcd.print(avg);

//Serial.print(avg);
//Serial.print("Avg, ");
//Serial.print(duration);
//Serial.print("cm");
//Serial.println();
//Serial.print(inches);
//Serial.print("in");
//Serial.println();

delay(250);

}

CIRCUIT DIAGRAM

OUTPUT