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

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

Ans-

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.

Circuit Diagram :

Code :

int trigPin = 4; // assigning trigger pin
int echoPin = 8; //assigning echo pin
long duration, cm, inches;
long sum=0; // initiallly we're assigning as zero
long avg;
int i;

void setup()

{
Serial.begin (9600); //baudrate
pinMode(trigPin, OUTPUT);
pinMode(echoPin, INPUT);
}

void loop()

{
digitalWrite(trigPin, LOW);
delayMicroseconds(5);
digitalWrite(trigPin, HIGH);
delayMicroseconds(10);
digitalWrite(trigPin, LOW);
pinMode(echoPin, INPUT);
duration = pulseIn(echoPin, HIGH);
cm = (duration/2) / 29.1;
inches = (duration/2) / 74;
for (i=0; i<5; i++)
{
sum=sum+inches;
avg = sum/5;
}
Serial.print(avg);
Serial.print("Avg, ");
Serial.print(cm);
Serial.print("cm");
Serial.println();
Serial.print(inches);
Serial.print("in");
Serial.println();
delay(250);
}