Final Project Ping))) Characterization Farhaz Karmali Harshit Goyal Andrew Tomlinson

Project Description Interface a Parallax Ping))) Ultrasonic Range Finder with the Arduino Uno microcontroller package Characterize the Ping))) sensor for general use through experimentation Create a simple GUI to display the distance found by the Ping)))

The Arduino Uno The Arduino Uno R2 Board for the ATmega328 microcontroller 16 MHz Power from PC USB B connector Programming with Arduino IDE

The Ping))) Range Finder Male 3-pin header GND 5 VDC SIG 40 KHz Tx

Limitations a) Object is more than 3 meters away b) Reflective surface at low incidence ang. c) Object is too small to be detected

Limitations cont. Objects that absorb sound or have a soft or irregular surface may not reflect enough sound to be detected accurately. Air temperature affects the speed of sound according to: Cair = 331.5+ (0.6× TC ) m/s Percent error over 0 to 70 ° C is significant: 11 to 12 percent

Limitations cont.

A bit of code…

Code continued

C#

C#

The Wall

The Ball

The Tube

The Block

Special Notes Acoustics of material Temperature Object Shape

References Ping Datasheets: Andy Pope excel add-in: http://www.parallax.com/dl/docs/prod/acc/28015-PING-v1.3.pdf http://www.parallax.com/Portals/0/Downloads/docs/prod/acc/28015-PING-v1.5.pdf Andy Pope excel add-in: http://www.andypope.info/charts/polarplot.htm