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.

Measuring the distance in terms of inches of an object using Ultrasonic Distance Sensor (28015 Ping).

DESIGN:

Code:

const int pin =2;//seting pin 2 as signal pin
long sum =0;//declaring all the global variable
long avg;

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

}
void loop()
{

long time ,inch ,cm;
long result;
pinMode(pin,OUTPUT);//makeing pin 2 as output
digitalWrite(pin,LOW);//making low for some time
delayMicroseconds(2);
digitalWrite(pin,HIGH);//making that pin has high
delayMicroseconds(2);
digitalWrite(pin,LOW);//making it has low
pinMode(pin,INPUT);
time=pulseIn(pin,HIGH);//getting the retrun wave noted in the time
//result=conversion(time);//calling the function
cm=(time/2)/29;//value from function part are calculated for the CM
inch=(time/2)/74;//value from function part are calculated for the Inches

Serial.println("inch");
Serial.println(inch);
Serial.println("cm");
Serial.println(cm);

delay(500);
}

The sensor data is smoothened by using Moving average filter technique to eliminate the high frequency variations from the sensor data

// Moving average filter code
long conversion( long time)
{
int a[5];//intializing the variable
int i;

for(i=0;i<5;i++)
{
a[i] = time;//storing the value in array upto window size as 5
i++;
}
for(i=0;i<5;i++)
{
sum=sum+a[i];
}

return avg=sum/5; //returning that value
}

OUTPUT: