Final ProjectPing))) 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:– 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